Chapter 11-Transportation in Animals and Plants – Fill in the Blanks with Answers (Solved Worksheet)
1. The __________ system in organisms is responsible for the transportation of essential substances like food, water, and oxygen.
Answer: Circulatory
Explanation: The circulatory system is the primary system involved in transporting necessary substances throughout the body, ensuring that every part receives what it needs for proper function.
2. __________ in the blood are essential components that assist in the clotting process, preventing excessive bleeding from injuries.
Answer: Platelets
Explanation: Platelets play a vital role in the blood clotting process, helping prevent excessive loss of blood during injuries by forming clots.
3. Red Blood Cells contain __________, a red pigment responsible for transporting oxygen to all parts of the body.
Answer: Haemoglobin
Explanation: Haemoglobin is present in Red Blood Cells (RBCs), and it binds oxygen, ensuring its transportation to various parts of the body for cellular processes.
4. White Blood Cells (WBCs) help in fighting against __________ that enter the body, acting as a defence mechanism.
Answer: Germs
Explanation: White Blood Cells (WBCs) are essential for immune defence, protecting the body against germs, infections, and foreign particles.
5. The waste products generated in the body need to be transported to parts where they can be __________.
Answer: Removed
Explanation: For maintaining a healthy internal environment, waste products generated within the body must be transported to specific parts for removal or excretion.
6. The walls of arteries are ________ and ________, enabling them to handle high blood pressure.
Answer: muscular, thick
Explanation: The walls of arteries are described as muscular and thick in the text, allowing them to withstand and maintain the high pressure of oxygen-rich blood pumped directly from the heart.
7. The ________ artery is unique because it carries oxygen-poor, carbon dioxide-rich blood from the heart to the lungs.
Answer: Pulmonary
Explanation: The passage specifically mentions the unique nature of the pulmonary artery carrying oxygen-depleted blood from the heart to the lungs.
8. In the circulatory system, veins act as ________ channels, carrying deoxygenated blood back to the heart and lungs.
Answer: return
Explanation: Veins are described as return channels in the circulatory system, guiding deoxygenated blood back towards the heart and lungs for purification.
9. Capillaries facilitate the exchange of oxygen, nutrients, and waste materials due to their ________ walls.
Answer: thin
Explanation: The text emphasises the thin walls of the capillaries, which allow them to facilitate the efficient exchange of essential substances and waste materials between the blood and body cells.
10. Veins have ________ that prevent the backward flow of blood, ensuring that blood flows back to the heart efficiently.
Answer: one-way valves
Explanation: The passage mentions the presence of one-way valves in veins, crucial in preventing the backward flow of blood and ensuring its efficient return to the heart.
11. Arteries branch into smaller vessels, extending the reach of oxygenated blood to every ________ in the body.
Answer: cell
Explanation: The text highlights that arteries branch out to reach every cell in the body, ensuring the delivery of oxygenated blood to all parts.
12. The _______ is the part of the heart that receives oxygen-rich blood from the lungs.
Answer: Left Atrium
Explanation: The left atrium receives oxygen-rich blood returning from the lungs, which is then passed to the left ventricle to be pumped to various parts of the body.
13. Capillaries play a crucial role in the exchange of _______ between the blood and body’s cells.
Answer: materials (or oxygen and nutrients)
Explanation: Capillaries, due to their thin walls, facilitate the efficient exchange of oxygen, nutrients, and waste materials between the blood and body cells.
14. The pulse originates from the heart’s _______.
Answer: contractions
Explanation: The rhythmic throbbing or vibration (pulse) felt in various parts of the body originates from the heart’s contractions, pushing blood into the arteries.
15. The right side of the heart deals with _______ blood.
Answer: carbon dioxide-rich (or deoxygenated)
Explanation: The right side of the heart is responsible for receiving deoxygenated or carbon dioxide-rich blood from the body and pumping it to the lungs for oxygenation.
16. The pulmonary artery carries oxygen-_______ blood from the heart to the lungs.
Answer: poor (or deoxygenated)
Explanation: The pulmonary artery is unique as it carries oxygen-poor or deoxygenated blood from the heart to the lungs for oxygenation, unlike other arteries that carry oxygen-rich blood.
18. The heart operates in a well-coordinated sequence, initially, the atria receive the blood, and then they contract to push the blood into the ________.
Answer: ventricles
Explanation: This answer is correct because the passage mentions that after the atria are filled, they contract to push the blood into the ventricles.
19. The rhythmic contraction and relaxation of the heart muscles are also known as the ________.
Answer: heartbeat
Explanation: This is the term used in the passage to describe the rhythmic contraction and relaxation of the heart muscles.
20. Doctors use an instrument known as a ________ to listen more precisely to heartbeats.
Answer: stethoscope
Explanation: According to the text, a stethoscope is the instrument used by doctors to listen to the heartbeats more precisely.
21. Valves within the heart ensure a one-way flow of blood, preventing ________.
Answer: backflow
Explanation: In the text, it is mentioned that the valves play a crucial role in ensuring that the blood flows in one direction by preventing backflow.
22. The right atrium of the heart receives ________ blood from the body.
Answer: deoxygenated
Explanation: The passage specifies that the right atrium gets deoxygenated blood from various parts of the body.
23. Sponges and Hydra lack a defined _________ system.
Answer: circulatory
Explanation: Sponges and Hydra do not possess a specialised circulatory system because they live in water, which naturally provides them with necessary oxygen and nutrients and helps in removing waste materials and carbon dioxide from their bodies.
24. The primary waste product of humans is ________.
Answer: urea
Explanation: Urea is the main waste product eliminated by humans, formed due to the metabolism of proteins and excreted by the kidneys.
25. The _________ system in animals is responsible for disposing of waste products resulting from metabolic processes.
Answer: excretory
Explanation: The excretory system is involved in the removal of waste products that are produced from the metabolic activities within an organism’s body, maintaining internal balance and preventing potential harm.
26. Birds and reptiles excrete waste primarily in the form of _________ to conserve water.
Answer: uric acid
Explanation: Uric acid is a semi-solid, white-coloured compound excreted by birds and reptiles as a water-conserving adaptation to their terrestrial environments.
27. The organ essential for filtering waste from the blood in humans is the _________.
Answer: kidney
Explanation: The kidney plays a crucial role in the human body by filtering waste products and excess substances from the blood, ensuring the maintenance of a healthy internal environment.
28. The human excretory system is crucial for removing _________ from the bloodstream.
Answer: waste products
Explanation: The human excretory system is designed to rid the body of unwanted waste products, thereby ensuring the body’s health and internal balance.
29. The kidneys are positioned in the _________ cavity.
Answer: abdominal
Explanation: The kidneys, which play a significant role in filtering blood, are located in the abdominal region of the body.
30. Urine is transported from the kidneys to the urinary bladder by the _________.
Answer: ureters
Explanation: Ureters serve the specific purpose of transporting urine from the kidneys to the urinary bladder for temporary storage.
31. The urinary bladder acts as a _________ for urine until it’s expelled.
Answer: reservoir
Explanation: The urinary bladder functions as a storage unit, holding urine until it’s appropriate for expulsion.
32. Sweat plays a role in excretion as well as _________.
Answer: thermoregulation
Explanation: Sweat not only helps in excreting certain wastes but is also essential for cooling the body and maintaining its temperature.
33. The absorption of water and minerals in plants primarily occurs through specialised structures known as ________.
Answer: root hairs
Explanation: Root hairs enhance the absorption of water and minerals from the soil due to their strategic positioning and structure, facilitating the uptake of essential nutrients.
34. In plants, the ________ is primarily involved in the transportation of synthesised food.
Answer: phloem
Explanation: Phloem specialises in transporting synthesised food (like glucose produced during photosynthesis) to various parts of the plant to meet nutritional needs.
35. The process of photosynthesis mainly takes place in the ________ of plant cells.
Answer: chloroplasts
Explanation: Chloroplasts in the cells, primarily in the leaves, are where photosynthesis occurs, utilising water and carbon dioxide to produce glucose and oxygen.
36. Vascular tissues specialised in transporting water and minerals in a plant are known as ________.
Answer: xylem
Explanation: Xylem tissues act like pipes, forming a continuous network throughout the plant, enabling efficient transport of water and minerals from the roots to other parts.
37. In plants, energy for cellular activities is derived from the breakdown of ________.
Answer: glucose
Explanation: Glucose, produced during photosynthesis, is broken down during cellular respiration, providing energy for various vital cellular processes and activities.
38. Transpiration is the process by which plants lose water in the form of ________ from the surface of their leaves.
Answer: water vapour
Explanation: Transpiration is defined as the process where plants lose water in the form of water vapour, primarily through the surface of their leaves.
39. Excess water absorbed by the plants is evaporated through tiny openings called ________ located on the surface of leaves.
Answer: stomata
Explanation: Stomata are the tiny openings on the leaves’ surface that act as gateways for water vapour to exit the plant during transpiration.
40. Transpiration creates a ________ or suction force, enabling the plant to draw water from the roots upwards.
Answer: vacuum
Explanation: As water evaporates during transpiration, it creates a suction force or vacuum, assisting in the upward transport of water from the roots.
41. Through transpiration, a continuous flow of water is maintained within the plant, allowing for the efficient delivery of ________.
Answer: necessary nutrients
Explanation: Transpiration ensures a consistent flow of water in the plant, which aids in the transportation and delivery of vital nutrients throughout the plant.
42. Transpiration helps plants adapt to their environment by managing their internal ________ and water balance.
Answer: temperature
Explanation: One of the main effects of transpiration is the regulation of a plant’s internal temperature. It also aids in balancing the plant’s internal water levels, adapting it to its environment.
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Class 7 – Science- Chapter 11-Transportation in Animals and Plants Question Answer (Solved MCQs)
