Accumulation of which one of the following in the leads to cramp ........

General Science (CDS) Biology

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Accumulation of which one of the following in the leads to cramp?

Lactric acid

Ethanol

Pyruvic acid

Glucose

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Explanation:

Mammalian and avian hearts have four chambers two atria and two ventricles. Amphibians and reptiles, by contrast, have a threechambered heart. The three-chambered heart consists of two atria and one ventricle. Fish possess the simplest type of true heart a twochambered organ composed of one atrium and one ventricle.