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Body Fluids and Circulations

Fill In the Blanks

91.

Haemoglobin is present in_________.

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Long Answer Type

92.

What are the functions of the circulatory system?

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93.

Differentiate between an artery and a vein.

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94.

Briefle describe the regulation of the cardiac activity.

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95.
Describe double circulation.

Single blood circulation:In this type of circulation, blood only once comes

into heart.

Fig. Single blood circulation in fishes

The impure blood from all parts of the body comes into heart and then circulated to gills. In gills, blood is purified and goes to dorsal aorta which supplies it to all parts of the body. It occurs in Scoliodon, Labeo etc. Such a heart which always gets deoxygenated blood for circulation is called venous heart.

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