Question

(a) Draw the diagram of heart and put the following label

Right auricle, left ventricle, pulmonary artery, pulmonary vein and valves.

Write any two functions of any part


(b) Write about excretion in aquatic and land animals. ​

Answer 1

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a) The right ventricle is the chamber of the heart that pumps out deoxygenated blood.

Pulmonary vein is the blood vessel that carries oxygenated blood from the heart to different body parts.

The pulmonary artery carries deoxygenated blood from different parts of the body to the heart.

Aorta is the largest artery in the body. The heart pumps blood from the left ventricle into the aorta through the aortic valve which helps in one way blood flow.

b) Aquatic animals like fishes, excrete cell waste as ammonia which directly dissolves in water. Some land animals like birds, lizards, snakes excrete a semi-solid, white coloured compound (uric acid). The major excretory product in humans is urea.