Match the items given in column A with items given in column B. Column A Column B i) A fish A) 72 per minute ii) Left atrium B) Fight infections iii) Tissue fluid C) 2 chambered heart iv) Pulse D) Oxygenated blood v) White blood cells E) Becomes lymph in the lymph capillaries

(i) — (C) A fish is an aquatic animal that has a 2 chambered heart. The heart in a fish receives deoxygenated blood from the body and pumps it to the gills directly for oxygenation. Thus, they have one auricle and one ventricle. (ii) — (D) The left side of the heart deals with the pumping of the oxygenated blood. The left atrium receives the oxygenated blood from the lungs through the pulmonary veins. (iii) — (E) The plasma part of blood leaks out of blood capillaries and enters the intercellular spaces of tissues as tissue fluid. As this tissue fluid enters into the lymph capillaries, it is called lymph. (iv) — (A) The wave of distension of an artery every time blood is forced through it is called the pulse. If the heart contracts 72 times per minute then the pulse will be 72 beats per minute. (v) — (B) The white blood cells are produced in the bone marrow and help to increase the immunity of the body by fighting infections. These cells protect the body against germs by performing phagocytosis and by producing antibodies against foreign antigens. Column A Column B i) A fish C) 2 chambered heart ii) Left atrium D) Oxygenated blood iii) Tissue fluid E) Becomes lymph in the lymph capillaries iv) Pulse A) 72 per minute v) White blood cells B) Fight infections

HARD

Earn 100

Draw a block diagram to explain single and double circulation. Write differences between them.

Important Questions on Circulation

MEDIUM

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Choose the correct sequence:

EASY

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Correct course of blood circulation in human heart.

MEDIUM

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Separation of oxygenated and deoxygenated blood.

I. Fulfils energy requirement of the body.

II. Ensures the effect transfer of oxygen in the body.

EASY

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Which one of the following animals has two separate circulatory pathways?

MEDIUM

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Why are the gills of Fish fine and delicate?

MEDIUM

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Explain double circulation in amphibians.

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Closed circulatory system is found in:

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

To which part oxygenated blood from gills is taken in a fish? (Operculum/ Heart/ Lungs/ Body)

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Organisms such as sponges and Hydra do not possess any circulatory system. Find out how transportation of materials occurs in these organisms.

HARD

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

How are food, oxygen, CO₂ and other waste materials transported in animals such as sponges and Hydra?

MEDIUM

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

How many times the blood goes through the heart during one cycle in fish and why?

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

What is the difference between heart of fish and that of frog?

EASY

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Explain double circulation in fishes.

MEDIUM

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Explain the statement: Blood goes only once through the heart in fishes.

HARD

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Match the items given in column A with items given in column B.

Column A	Column B
i) A fish	A) 72 per minute
ii) Left atrium	B) Fight infections
iii) Tissue fluid	C) 2 chambered heart
iv) Pulse	D) Oxygenated blood
v) White blood cells	E) Becomes lymph in the lymph capillaries

MEDIUM

Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

In fish, the heart receives only pure blood.

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Explain the path taken by a drop through various chambers of heart.

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

Name one animal having a single circulation of blood and another having double circulation.

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Life Science>Physiological Processes of Life>Circulation>Course of Circulation of Blood

What is meant by the terms ‘single circulation’ and ‘double circulation’?

Draw a block diagram to explain single and double circulation. Write differences between them.

Important Questions on Circulation

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