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Skeletal, Digestive and Circulatory System of Frog

Frog, being a typical vertebrate, shows the presence of a skeletal system that forms the internal supporting framework for the body. It can be distinguished into an axial skeleton and an appendicular skeleton. Axial skeleton consists of skull, vertebrae and sternum. Appendicular skeleton consists of the girdles (pectoral and pelvic) and the limb bones.

structure of frog skeletal system

Skeletal System of a Frog


Digestive system and feeding

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A well developed digestive system is present. It consists of an alimentary canal and associated structures. The alimentary canal is distinguished into an oesophagus, a stomach, a small intestine and a large intestine. Liver and pancreas are the major associated glands.

Frog is basically an insectivorous animal. The tongue can be projected out of the buccal cavity to capture an insect from a short distance.

illustration of frog digestive system

Digestive System

Circulatory system

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It consists of heart, blood vessels and blood. Heart is three chambered with two auricles and one ventricle. There is a mixing of the oxygenated and deoxygenated blood in the ventricle. Blood vessels are represented by arteries, veins and capillaries. Arteries, which carry blood away from the heart to different parts of the body collectively form an arterial system. Veins, which carry blood from different parts of the body towards the heart, collectively form a venous system. Blood is red in colour. Hemoglobin is present in red blood corpuscles which are biconvex and nucleated.

view of frog circulatory system

Circulatory System

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