What organs does the circulatory system of vertebrate animals consist of? What functions do they perform? Describe blood circulation circles
Vertebrate animals and humans have a closed circulatory system. It consists of the heart and blood vessels forming circles of blood circulation. From the heart to other organs of the body, blood flows through the arteries, and returns through the veins. In the organs, large blood vessels branch, forming a network of small capillaries, through the walls of which there is an exchange of gases and nutrients between the cells of the body’s tissues.
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