AP BIOLOGY

Detailed explanation-1: -Blood can flow through vessels inside the body, such as arteries and veins. This type of circulation is called closed circulation. Open circulation happens when there are no vessels to contain the blood, and it flows freely through the cavities of the body.

Detailed explanation-2: -In a closed circulatory system, blood is contained inside blood vessels, circulating unidirectionally (in one direction) from the heart around the systemic circulatory route, then returning to the heart again.

Detailed explanation-3: -Blood flows inside the body through vessels such as arteries and veins. This type of circulation is called Closed circulation. Open circulation takes place in the absence of vessels to contain the blood and it flows freely through the cavities of the body.

Detailed explanation-4: -Most open circulatory systems DO have a heart to keep hemolymph flowing through the body.

Detailed explanation-5: -Similarities Between Open and Closed Circulatory System A fluid is circulated throughout the body in both circulatory systems. Both circulatory systems are governed by a pumping mechanism, which is the heart. Both circulatory systems comprise a dorsal blood vessel.