Fill in the table “Features of the structure of the internal organs of the frog”.
| October 30, 2020 | Education
| 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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