Question

Q. 5. Explain :
(i) Blood goes only once through the heart in fishes
(ii) Plants have low energy needs.
(iii) What are capillaries?​

Answer 1

Answer:Blood goes only once through the heart of fishes in one cycle because they have a two chambered heart

Plants do not need to move from one place to another. Movements in a plant are usually at the cellular level and hence a far less amount of energy is required by plants.

any of the fine branching blood vessels that form a network between the arterioles and venules.

Explanation:

Answer 2

1=blood goes only once through the heart of fishes in one cycle because they have a two chambered heart . They take oxygen through gills where the blood is oxygenated and passed through the heart to the rest of the body.

2=Plants do not need to move from one place to another. Movements in a plant are usually at the cellular level and hence a far less amount of energy is required by plants. Animals, on the other hand, need to move from one place to another; in search of food. So, the energy need of animals is pretty higher than of plants.

3=any of the fine branching blood vessels that form a network between the arterioles and venules.

2.

a tube that has an internal diameter of hairlike thinness.

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