Fill in the table “Features of the structure of the internal organs of the frog”.

Organ system name Structural features
Digestive Same as fish
Respiratory The respiratory organs are the lungs and the skin, which has a large number of glands.
Circulatory In amphibians, a second circle of blood circulation appears, in the heart it becomes three-chambered, 2 atria and a ventricle
Nervous Consists of central and peripheral parts, the brain is better developed than in fish
Excretory The kidneys that are on the sides of the spine
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