The circulatory system of a crayfish includes all of the following except
A) heart.
B) arteries.
C) sinuses and lacunae.
D) veins bringing blood into the heart.
E) blood.

Question

Quizplus · Accepted Answer

Crayfish have an open circulatory system, which means that there are no veins bringing blood into the heart. Instead, the blood flows freely through the sinuses and lacunae. However, they do have a heart, arteries, and blood, which are all part of the circulatory system.

The Circulatory System of a Crayfish Includes All of the Following