In an Open Circulatory System,where is Blood Found

Question

In an open circulatory system,where is blood found?
A)always inside of vessels and under higher pressure than in closed circulatory systems
B)not always confined to blood vessels and under higher pressure than in closed circulatory systems
C)always inside of vessels and under lower pressure than in closed circulatory systems
D)not always confined to blood vessels and under lower pressure than in closed circulatory systems
E)not always confined to blood vessels and under the same pressure as in closed circulatory systems

Accepted Answer

In an open circulatory system, blood is not always confined to blood vessels and is under lower pressure than in closed circulatory systems. This is because in open systems, blood flows through spaces called sinuses and comes into direct contact with the tissues and organs of the body, providing nutrients and removing waste products. The lack of pressure gradient in open systems also means that the rate of blood flow is slower compared to closed systems.