Class 11 Archives - Page 3 of 11 - CBSE Class Notes Online

Biology / Biology / Biology Concepts / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / NCERT Long Question Answers / NEET Biology / Notes / Question And Answer / Science Facts / Transportation

Heart Valves- Types, Location, Structure and Functions

March 17, 2023November 1, 2023 - by Jaishree Gorane - 3 Comments.

The human Heart has four chambers, and four valves ensure that blood flows in the correct direction. The valves are made up of thin flaps of tissue that open and close like doors. There are four main types of Heart valves – the Aortic Valve, Mitral Valve, Pulmonary Valve and Tricuspid Valve. Each valve plays a vital role in regulating blood flow in and out of the Heart. Any problems with the valves can lead to a variety of conditions that affect Heart function.

Biology / Biology / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / NCERT Long Question Answers / NEET Biology / Notes / Question And Answer / Science / Transportation / Uncategorized

Capillaries – Definition, Location, Structure, Types, Functions and Importance

March 16, 2023April 11, 2023 - by Jaishree Gorane - 1 Comment

Capillaries are tiny blood vessels connecting arterioles and venules, with a crucial role in exchanging glasses, nutrients and waste products. They are composed of a single layer of endothelial cells . They are classified into three types based on structure -continuous, fenestrated and sinusoidal. . Capillaries have various functions including oxygen and nutrient exchange, waste removal, regulation of blood pressure, heat exchange, immune response, hormonal regulation and disease diagnosis and treatment.

Biology / Biology / Biology Concepts / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / NCERT Long Question Answers / NEET Biology / Notes / Question And Answer / Science / Science Facts / Transportation

Veins – Structure , functions ,Venous System and Circuits and Vein Valves

March 16, 2023April 11, 2023 - by Jaishree Gorane - 6 Comments.

Veins are vital blood vessels that collect oxygen-poor blood and transport it back to the heart. They are made up of three layers of tissue and fibers, and can contain one-way valves that keep blood flowing in the right direction. Veins transport oxygen-poor blood throughout the body and oxygen-rich blood from the lungs back to the heart. Veins require external forces such as breathing and muscle movement to push blood in the right direction.

Types of Veins and their Functions

March 15, 2023December 23, 2023 - by Jaishree Gorane - Leave a Comment

Veins are essential for the circulatory system, transporting blood back to the heart. Four main types of veins include pulmonary, systemic, superficial and deep veins, each with unique characteristics. Pulmonary veins carry oxygenated blood from the lungs to the heart’s left atrium, while systemic veins transport deoxygenated blood from the body’s tissues back to the heart. Superficial veins are smaller and near the skin’s surface and deep veins are larger and deeper in the body.

Biology / Biology / Biology Concepts / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / NCERT Long Question Answers / NEET Biology / Notes / Question And Answer / Science / Science Facts / Transportation

Arteries in The Body

March 14, 2023April 11, 2023 - by Jaishree Gorane - 7 Comments.

Arteries in the body are an essential component of the Circulatory System. There are two main circuits- Pulmonary and Systemic Circuit. Arteries are classified based on their size and composition. Elastic arteries, such as the aorta, are the largest and most flexible, while muscular arteries and arterioles are responsible for directing blood flow to specific areas. Major arteries, including those in the head and neck, torso, abdomen, arms and legs play vital roles in delivering oxygen and nutrients throughout the body.

Biology / Biology / Biology Concepts / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / NEET Biology / Notes / Science / Science Facts / Transportation / Uncategorized

Arteries – Structure , Layers, Functions

March 12, 2023April 11, 2023 - by Jaishree Gorane - 7 Comments.

Arteries are essential blood vessels responsible for carrying oxygen-rich blood away from the heart and distributing it throughout the body. Arteries are thick, muscular, and elastic, designed to withstand high pressure. Arteries have three main layers – the Tunica Intima, Tunica Media and Tunica Adventitia – each with distinct structures and functions.

Biology / Biology / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / NCERT Long Question Answers / NEET Biology / Question And Answer / Science / Transportation / Uncategorized

Why Do Arteries Have Thick Elastic Walls ?

March 10, 2023March 12, 2023 - by Jaishree Gorane - 5 Comments.

Arteries have thick elastic walls for several reasons like regulating blood pressure, resisting wear and tear, maintaining efficient blood flow, protecting against aneurysms and preserving structural integrity. The tunica media layer, which contains smooth muscle cells and elastic fibers, allows for contraction and relaxation to adjust the diameter of the blood vessels. The reasons for thick elastic walls in arteries are essential for the proper functioning of the circulatory system.

Biology / Biology / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / NEET Biology / Science / Transportation / Uncategorized

Difference between Double Circulation and Single Circulation

March 8, 2023June 27, 2023 - by Jaishree Gorane - 4 Comments.

The Difference between Double Circulation and Single Circulation lies in the number of circuits the blood passes through in its journey around the body. Single circulation occurs in fish, while double circulation occurs in mammals, birds and reptiles. The factors that differentiate the two include the presence of a pulmonary circuit, the number of chambers in the heart, the direction of blood flow etc.

Neatly labelled easy to draw diagram of blood vessels - arteries ,veins, capillaries

Biology / Biology / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / Class 9 / NEET Biology / Science / Transportation

Blood Vessels Diagram

March 7, 2023March 20, 2023 - by Jaishree Gorane - 3 Comments.

The blood vessels diagram shows the structure of arteries and veins. Arteries have a thick tunica media layer to handle the high-pressure blood flow while veins have a thinner tunica media and a larger lumen to accommodate a higher volume of blood. the smallest blood vessels have thin endothelial cell walls and a narrow lumen that allows for the exchange of nutrients and waste products with pericytes and red blood cells. A neatly labeled diagram makes it easy to understand.

Biology / Biology / Biology Concepts / Body Fluids and Circulation / Chapter 6 Life Processes - Class 10 / Class 10 / Class 11 / Class 12 / Class 9 / NCERT Long Question Answers / NEET Biology / Notes / Science / Science Facts / Tissues- Chapter 6 / Transportation

How Lymph is Formed ?

March 1, 2023February 9, 2024 - by Jaishree Gorane - 5 Comments.

This article explains the formation of lymph, a colorless body fluid. It highlights that lymph originates as interstitial fluid, which collects in lymphatic capillaries, transforming into lymph. This fluid then passes through the lymphatic system, where it is filtered by lymph nodes before returning to the bloodstream. This process is essential for nutrient delivery, waste removal, and immune system support.