AP BIOLOGY

Detailed explanation-1: -Humans have a closed circulatory system. The blood is enclosed in the vessels and the heart while circulating. The blood travels through arteries and veins and carries important molecules throughout the body.

Detailed explanation-2: -For humans, a closed circulatory system is more efficient at delivering blood and nutrients. This system creates pressure, enabling the blood to travel farther and deliver more oxygen. Animals with closed circulatory systems generally have a higher metabolism than animals with open circulatory systems.

Detailed explanation-3: -In humans, blood flows through blood vessels (arteries, veins, and capillaries) and the heart pumps blood. This type of system is known as a closed circulatory system.

Detailed explanation-4: -Complete answer: All vertebrates including human beings, have a closed type of circulatory system. This type of circulatory system differs both in the structure and function from an open type circulatory system that is present in insects and other arthropods.

Detailed explanation-5: -All mammals, fish, birds, reptiles, and amphibians have a closed circulatory system. Some invertebrates, like earthworms, octopuses, and squids, also have a closed circulatory system.