Table of Contents
Nutrition in Animals- Worksheets
These 4 worksheets are based on the chapter “Nutrition in Animals.” This chapter explains how animals, including humans, obtain and process their food. The worksheets, available in both solved and unsolved formats, are designed to aid in understanding and applying the concepts from the chapter.
Key concepts included in the chapter and addressed in these worksheets are-
- Different Ways of Taking Food- Exploring how various animals ingest their food, ranging from simple to complex methods.
- Digestion in Humans- Understanding the human digestive system, including the process of digestion and the role of different organs.
- Digestion in Other Animals- Learning about the digestive processes in other animals, including ruminants and simple organisms like Amoeba.
- Feeding and Digestion in Amoeba- A detailed look at how single-celled organisms like Amoeba ingest and digest food.
The solved worksheets provide step-by-step solutions and methods, while the unsolved ones offer opportunities for students to practise and test their understanding.
Also Check – Rapid Revision – Class 7 Science -Chapter 2 – Nutrition in Animals – Complete Notes
Worksheet 1 – Nutrition in Animals – Student Worksheet (Unsolved)
Explain the different ways animals take food and provide examples.
Describe the human digestive system and its main components.
What is the role of the buccal cavity in digestion?
Explain the process of digestion in the stomach and the role of hydrochloric acid.
Describe the function of the small intestine in the digestion process.
Complete the following sentences-
(a) The large intestine is responsible for the absorption of _________________.
(b) The _________________ stores bile juice secreted by the liver.
(c) _________________ is the process of taking food into the body.
(d) The breakdown of complex components of food into simpler substances is called _________________.
Identify the following-
(i) An organ where partial digestion occurs.
(ii) The enzyme responsible for the breakdown of starch.
(iii) A single-celled organism that captures food using pseudopodia.
Choose the correct answer-
(a) In ruminants, the partially digested food returned to the mouth is called-
(i) Chyme (ii) Bolus (iii) Cud (iv) Bile
(b) Which part of the digestive tract is involved in the absorption of water and salt from undigested food?
(i) Small intestine (ii) Stomach (iii) Oesophagus (iv) Large intestine
Match the following-
| Column I | Column II |
| Salivary glands | Produces saliva |
| Gallbladder | Stores bile |
| Stomach | Protein digestion |
| Small intestine | Nutrient absorption |
True or False Statements-
(i) The liver produces digestive enzymes. (T/F)
(ii) Amoeba uses cilia for capturing food. (T/F)
(iii) Rumination occurs in grass-eating animals. (T/F)
(iv) The large intestine is the main site of digestion. (T/F)
Choose the correct answer-
What is the primary function of villi in the small intestine?
(i) Digesting food (ii) Storing food (iii) Absorbing nutrients (iv) Secreting enzymes
Multiple-choice question-
Which of these is not a part of the human digestive system?
(i) Pancreas (ii) Liver (iii) Heart (iv) Salivary glands
Explain the process of digestion in grass-eating animals and the significance of rumination.
Also Check – Chapter 2 – NUTRITION IN ANIMALS -Class 7 – Complete Notes
Worksheet 1 – Nutrition in Animals – Solved Worksheet with Answer
Explain the different ways animals take food and provide examples.
Animals take food in various ways-
- Herbivores like cows eat plants.
- Carnivores like lions eat other animals.
- Omnivores like humans eat both plants and animals.
- Filter feeders like oysters filter tiny organisms from water.
- Detritivores like earthworms eat decaying organic matter.
Describe the human digestive system and its main components.
- The human digestive system includes the mouth, oesophagus, stomach, small intestine, large intestine, and accessory organs like the liver, pancreas, and gallbladder. It is responsible for breaking down food, absorbing nutrients, and expelling waste.
What is the role of the buccal cavity in digestion?
- The buccal cavity (mouth) initiates digestion by mechanically breaking down food with teeth and chemically breaking it down with saliva.
Explain the process of digestion in the stomach and the role of hydrochloric acid.
- In the stomach, food is mixed with gastric juices containing hydrochloric acid and digestive enzymes. Hydrochloric acid kills bacteria and creates an acidic environment for enzymes to break down proteins.
Describe the function of the small intestine in the digestion process.
- The small intestine is where most of the digestion and absorption of nutrients occurs. Digestive enzymes and bile break down food, and the nutrients are absorbed through the intestinal walls into the bloodstream.
Complete the following sentences-
(a) water and electrolytes
(b) gallbladder
(c) Ingestion
(d) digestion
Identify the following-
(i) Stomach
(ii) Amylase
(iii) Amoeba
Choose the correct answer-
(a) (iii) Cud
(b) (iv) Large intestine
Match the following-
- Salivary glands – Produces saliva
- Gallbladder – Stores bile
- Stomach – Protein digestion
- Small intestine – Nutrient absorption
True or False Statements-
(i) F
(ii) F
(iii) T
(iv) F
Choose the correct answer-
(iii) Absorbing nutrients
Multiple-choice question-
(iii) Heart
Explain the process of digestion in grass-eating animals and the significance of rumination.
- Grass-eating animals, like cows, have a specialised stomach with multiple chambers. They initially chew food lightly before swallowing it into the rumen. Later, the food is regurgitated as cud, chewed thoroughly, and digested more completely. Rumination allows for more efficient breakdown and absorption of nutrients from tough plant matter.
Also Check – Chapter 2- Nutrition in Animals Class 7 Worksheet – Fill in the Blanks
Worksheet 2 – Nutrition in Animals – Student Worksheet (Unsolved)
Describe the various modes of feeding in different animals with examples.
Explain the role of teeth in the human digestive process.
Describe the process of digestion in the stomach.
Explain the role of the small intestine in digestion and nutrient absorption.
What is the significance of villi found in the small intestine?
Complete the following sentences-
(a) The primary function of the _________________ is to absorb water and salt from the undigested food.
(b) Diarrhoea can lead to _________________ due to the loss of water and salts from the body.
(c) In cows, the partially digested food called _________________ is regurgitated and re-chewed.
(d) The _________________ is a single-celled organism that captures food using pseudopodia.
Identify the following-
(i) The largest gland in the human body involved in digestion.
(ii) The enzyme that breaks down starch in the human digestive system.
(iii) An organ that plays a crucial role in re-chewing in ruminants.
Choose the correct answer-
(a) Which gland secretes digestive juices into the small intestine?
(i) Salivary gland (ii) Liver (iii) Pancreas (iv) Gallbladder
(b) The process by which the undigested food is removed from the body is called-
(i) Ingestion (ii) Absorption (iii) Egestion (iv) Assimilation
Match the following-
| Column I | Column II |
| Buccal cavity | Initial digestion of starch |
| Oesophagus | Peristalsis |
| Stomach | Acidic environment for digestion |
| Rumen | Cellulose digestion in ruminants |
True or False Statements-
(i) The liver produces bile which aids in fat digestion. (T/F)
(ii) Amoeba digests its food in a specialised stomach. (T/F)
(iii) Saliva contains enzymes that break down proteins. (T/F)
(iv) Large intestine is the main site for nutrient absorption. (T/F)
Choose the correct answer-
Which part of the human digestive system is responsible for the final breakdown and absorption of nutrients?
(i) Stomach (ii) Small intestine (iii) Large intestine (iv) Oesophagus
Multiple-choice question-
What happens to the undigested food in the human digestive system?
(i) It is absorbed as nutrients. (ii) It is converted into energy. (iii) It is stored in the stomach. (iv) It is expelled as waste.
Explain how the process of rumination aids in the digestion of cellulose in grass-eating animals.
Also check – Chapter 2- Nutrition in Animals Class 7 Worksheet – Multiple-Choice Questions (MCQs)
Worksheet 2- Nutrition in Animals – Solved Worksheet with Answer
Describe the various modes of feeding in different animals with examples.
Different animals have unique feeding modes-
- Snails scrape algae from rocks.
- Ants bite and chew plant material and other small animals.
- Eagles tear the flesh of their prey.
- Hummingbirds and butterflies suck nectar from flowers.
- Lice and mosquitoes suck blood.
- Houseflies suck on filth.
- Amoebas capture tiny aquatic animals.
- Pythons swallow their prey whole.
Explain the role of teeth in the human digestive process.
Teeth play a crucial role in mechanically breaking down food into smaller pieces through cutting, biting, grinding, and chewing, thus aiding in digestion.
Describe the process of digestion in the stomach.
The stomach’s inner lining secretes mucus, hydrochloric acid, and digestive enzymes. The mucus protects the stomach lining, the acid kills bacteria and aids protein digestion, and the enzymes break down food into a semi-solid paste called chyme.
Explain the role of the small intestine in digestion and nutrient absorption.
The small intestine is where complete digestion occurs, with secretions from the liver and pancreas aiding this process. It’s also the primary site for the absorption of nutrients into the bloodstream.
What is the significance of villi found in the small intestine?
Villi increases the surface area of the small intestine for effective absorption of digested food. They contain blood vessels that transport absorbed nutrients to different body parts.
Complete the following sentences-
(a) Large intestine
(b) Dehydration
(c) Cud
(d) Amoeba
Identify the following-
(i) Liver
(ii) Salivary amylase
(iii) Rumen
Choose the correct answer-
(a) (iii) Pancreas
(b) (iii) Egestion
Match the following-
Buccal cavity – Initial digestion of starch
Oesophagus – Peristalsis
Stomach – Acidic environment for digestion
Rumen – Cellulose digestion in ruminants
True or False Statements-
(i) T
(ii) F
(iii) F
(iv) F
Choose the correct answer-
(ii) Small intestine
Multiple-choice question–
(iv) It is expelled as waste.
Explain how the process of rumination aids in the digestion of cellulose in grass-eating animals.
Ruminants like cows swallow grass quickly, which is stored in the rumen and partially digested. The cud is then regurgitated, chewed again, and swallowed for complete digestion in the stomach and small intestine, aiding in the effective breakdown of cellulose.
Also Check – Chapter 2- NUTRITION IN ANIMALS -Class 7 Question and Answer (Long)
Worksheet 3 – Nutrition in Animals – Student Worksheet (Unsolved)
Describe the structure and function of the alimentary canal in humans.
Explain the digestion process in the buccal cavity.
Describe the role of saliva in the digestive process.
Explain the function of the stomach in digestion, including the role of hydrochloric acid and digestive juices.
Discuss the digestive process in the small intestine, including the role of liver and pancreas.
Complete the following sentences-
(a) The _________________ breaks down carbohydrates into glucose, fats into fatty acids, and proteins into amino acids.
(b) _________________ in the small intestine help in increasing the absorption of digested food.
(c) The primary function of the _________________ is to absorb water and salts from undigested food.
(d) The process of removing undigested food from the body is called _________________.
Identify the following-
(i) The first part of the small intestine where digestion is initiated.
(ii) The part of the small intestine responsible for absorption and assimilation.
(iii) The part of the small intestine that absorbs vitamin B12 and other nutrients.
Choose the correct answer-
(a) The largest gland in the human body, which secretes bile juice, is the-
(i) Pancreas (ii) Stomach (iii) Liver (iv) Small intestine
(b) The main cause of tooth decay is-
(i) Bacteria (ii) Acid (iii) Sugar (iv) Saliva
Match the following-
| Column I | Column II |
| Mouth | Ingestion and initial breakdown of food |
| Oesophagus | Transport of food to the stomach |
| Stomach | Protein digestion |
| Large Intestine | Absorption of water and salts |
True or False Statements-
(i) The small intestine is the site where most nutrient absorption occurs. (T/F)
(ii) The liver is responsible for producing digestive enzymes. (T/F)
(iii) Amoeba uses pseudopodia for capturing food. (T/F)
(iv) Diarrhoea can lead to dehydration due to extensive loss of water and salts. (T/F)
Choose the correct answer-
What is the main function of the large intestine in the human digestive system?
(i) Digestion of food (ii) Absorption of nutrients (iii) Absorption of water and salts (iv) Production of digestive enzymes
Multiple-choice question-
How does Amoeba digest its food?
(i) In a specialised stomach (ii) Using digestive enzymes in vacuoles (iii) Through photosynthesis (iv) It does not digest food
Describe the process of tooth decay and how it can be prevented.
Also Check – Chapter 2- NUTRITION IN ANIMALS -Class 7 Question and Answer (Short)
Worksheet 3- Nutrition in Animals – Solved Worksheet
Describe the structure and function of the alimentary canal in humans.
The alimentary canal, or digestive tract, in humans includes the mouth (buccal cavity), oesophagus (food pipe), stomach, small intestine, large intestine, and anus. It’s responsible for the ingestion, digestion, absorption of nutrients, and egestion of waste.
Explain the digestion process in the buccal cavity.
In the buccal cavity, ingestion takes place. Food is chewed with teeth, mixed with saliva from salivary glands, which moistens it and begins the breakdown of starch into sugar. The tongue helps in mixing food with saliva and swallowing it.
Describe the role of saliva in the digestive process.
Saliva, secreted by the salivary glands in the mouth, moistens the food and contains enzymes that initiate the breakdown of starch into simpler sugars.
Explain the function of the stomach in digestion, including the role of hydrochloric acid and digestive juices.
The stomach is a bag-like structure where food from the oesophagus enters. Its lining produces mucus to protect itself, hydrochloric acid to kill bacteria and activate digestive enzymes, and digestive juices to break down proteins into simpler substances.
Discuss the digestive process in the small intestine, including the role of liver and pancreas.
The small intestine is a coiled structure where the liver and pancreas release digestive juices. These juices help in breaking down carbohydrates into glucose, fats into fatty acids, and proteins into amino acids.
Complete the following sentences-
(a) Small intestine
(b) Villi
(c) Large intestine
(d) Egestion
Identify the following-
(i) Duodenum
(ii) Jejunum
(iii) Ileum
Choose the correct answer-
(a) (iii) Liver
(b) (i) Bacteria
Match the following-
- Mouth – Ingestion and initial breakdown of food
- Oesophagus – Transport of food to the stomach
- Stomach – Protein digestion
- Large Intestine – Absorption of water and salts
True or False Statements-
(i) T
(ii) F
(iii) T
(iv) T
Choose the correct answer-
(iii) Absorption of water and salts
Multiple-choice question-
(ii) Using digestive enzymes in vacuoles
Describe the process of tooth decay and how it can be prevented.
Tooth decay is caused by bacteria in the mouth breaking down leftover food, releasing acids that damage teeth. It can be prevented by keeping the mouth and teeth clean, avoiding high sugar foods, and using dental hygiene products like toothpaste and dental floss.
Worksheet 4 – Nutrition in Animals – Student Worksheet (Unsolved)
Explain the classification of animals based on their feeding habits. Provide examples for each category.
Describe the various modes of taking food in animals with examples.
Outline the steps involved in the process of nutrition in organisms.
Discuss the role of the buccal cavity and oesophagus in human digestion.
Explain the digestive process in the stomach and the role of hydrochloric acid and mucus.
Complete the following sentences-
(a) In ruminants like cows and buffaloes, partially digested food stored in the rumen is known as _________________.
(b) Amoeba captures food using _________________ and digests it in _________________.
(c) The _________________ is the longest part of the human alimentary canal and is involved in the final digestion and absorption of food.
- (d) The _________________ absorbs water and salts from undigested food in humans.
Identify the following-
(i) A part of the digestive system where cellulose digestion occurs in grass-eating animals.
(ii) The gland that secretes bile in humans.
- (iii) The structure in the small intestine that increases the surface area for absorption.
Choose the correct answer-
(a) Which part of the human alimentary canal receives secretions from the liver and pancreas?
(i) Stomach (ii) Small intestine (iii) Large intestine (iv) Oesophagus
(b) What is the primary function of the large intestine?
- (i) Digestion of food (ii) Absorption of nutrients (iii) Absorption of water (iv) Secretion of enzymes
- Match the following-
| Column I | Column II |
| Buccal cavity | Initial breakdown of food |
| Oesophagus | Food transport |
| Stomach | Protein digestion |
| Small intestine | Absorption of digested nutrients |
True or False Statements-
(i) The pancreas secretes enzymes that break down all categories of food. (T/F)
(ii) The large intestine plays a key role in the digestion of proteins. (T/F)
(iii) Amoeba uses pseudopodia for capturing food. (T/F)
- (iv) Ruminants like cows have a part called rumen for initial digestion of cellulose. (T/F)
Choose the correct answer-
Which structure in grass-eating animals aids in the digestion of cellulose?
- (i) Stomach (ii) Rumen (iii) Caecum (iv) Esophagus
Multiple-choice question-
In humans, where does the complete digestion of carbohydrates, fats, and proteins occur?
- (i) Stomach (ii) Small intestine (iii) Large intestine (iv) Mouth
- Describe the process of feeding and digestion in Amoeba.
Worksheet 4- Nutrition in Animals – Solved Worksheet with Answer
Explain the classification of animals based on their feeding habits. Provide examples for each category.
- Herbivorous- Animals like cows, sheep, and deer that feed only on plants or plant products.
- Carnivorous- Animals like tigers, lions, and eagles that feed on the meat of other animals.
- Omnivorous- Animals like dogs and humans that can feed on both plants and animal meat.
- Scavengers- Animals like vultures and crows that feed on dead and decaying meat left by other animals.
Describe the various modes of taking food in animals with examples.
- Chewing- Humans and dogs bite and grind food in the mouth.
- Scraping- Snails scrape food off surfaces.
- Syphoning- Bees and butterflies suck in food.
- Capturing and swallowing- Lizards capture food and swallow.
- Sucking- Mosquitoes pierce and suck liquids.
- Sponging- House Flies secrete saliva over food to dissolve it.
Outline the steps involved in the process of nutrition in organisms.
The steps are ingestion (intake of food), digestion (breaking down food to simpler forms), absorption (taking digested food into blood vessels), assimilation (transporting absorbed food to organs), and egestion (eliminating waste products).
Discuss the role of the buccal cavity and oesophagus in human digestion.
The buccal cavity involves the initial breakdown of food mechanically by teeth and chemically by saliva. The oesophagus propels partly digested food towards the stomach.
Explain the digestive process in the stomach and the role of hydrochloric acid and mucus.
In the stomach, hydrochloric acid kills bacteria and activates digestive juices, while mucus protects the stomach lining. Digestive juices break down proteins into simpler substances.
Complete the following sentences-
(a) Cud
(b) Pseudopodia; food vacuoles
(c) Small intestine
(d) Large intestine
Identify the following-
(i) Rumen
(ii) Liver
(iii) Villi
Choose the correct answer-
(a) (ii) Small intestine
(b) (iii) Absorption of water
Match the following-
- Buccal cavity – Initial breakdown of food
- Oesophagus – Food transport
- Stomach – Protein digestion
- Small intestine – Absorption of digested nutrients
True or False Statements-
(i) T
(ii) F
(iii) T
(iv) T
Choose the correct answer-
(ii) Rumen
Multiple-choice question-
(ii) Small intestine
Describe the process of feeding and digestion in Amoeba.
Amoeba captures food using pseudopodia, engulfs it into food vacuoles, where digestive juices break down the food into simpler substances for absorption and growth.
