ANATOMY

Detailed explanation-1: -In single circulation, the blood passes through a single circuit – where blood is pumped by the heart to the gills for oxygenation, after which the blood flows to the rest of the body and back to the heart. Animals such as fish are known to have single circulatory systems.

Detailed explanation-2: -Single circulation examples For example, birds, fish, reptiles, and other species share a single circulatory system. Blood goes from the heart to the gills, where it is cleaned before being dispersed to various parts of the body in a single circulatory system.

Detailed explanation-3: -Fishes have single circulation. They have a two-chambered heart comprising an atrium and a ventricle.

Detailed explanation-4: -Single circulation: In a blood circulation the blood passes through the heart only once. This type of circulation is called single circulation and the heart is called single circuit. Ex: Fish Double circulation: Blood passes twice through the heart. Once between heart and lungs and second time from heart to body parts.

Detailed explanation-5: -Blood returns to the heart via a vein. Because blood only passes through the heart once in a complete circuit around the body, fishes are said to have a single circulation. One disadvantage is that the narrow gill capillaries slow blood flow, resulting in low blood pressure in the body.