How many types of circulatory systems are found in animals?

1.	How many types of circulatory systems are found in animals?
Answer» There are two types of circulatory system, found in animals. They are: Open type circulation: 1. In this blood spreads out through large open spaces called sinuses, within the tissues of the body. 2. Body tissues are in direct contact with blood. 3. The volume of blood flowing in tissues cannot be regulated. 4. There is no heart. For example Insects like grasshopper, cockroach etc. Closed type Circulation: 1. The circulatory blood remains confined within the blood vessels at all times. It does not spread in open spaces. 2. Body tissues are not in direct contact with blood. 3. The volume of blood flowing through tissue or organ can be controlled by contraction and relaxation of muscles of arteries. 4. The heart is present, which works like a pumping station. For example Earthworm, Man (Human beings)

Answer»

There are two types of circulatory system, found in animals. They are:

Open type circulation:

1. In this blood spreads out through large open spaces called sinuses, within the tissues of the body.

2. Body tissues are in direct contact with blood.

3. The volume of blood flowing in tissues cannot be regulated.

4. There is no heart.

For example Insects like grasshopper, cockroach etc.

Closed type Circulation:

1. The circulatory blood remains confined within the blood vessels at all times. It does not spread in open spaces.

2. Body tissues are not in direct contact with blood.

3. The volume of blood flowing through tissue or organ can be controlled by contraction and relaxation of muscles of arteries.

4. The heart is present, which works like a pumping station.

For example Earthworm, Man (Human beings)

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