Which of the Following is a Key Feature of an Open

Question

Which of the following is a key feature of an open circulatory system?
A) No vessels carry the blood.
B) Open-ended vessels carry the blood.
C) Closed vessels carry the blood.
D) No heart pumps the blood.
E) Hemoglobin is carried in the blood.

Accepted Answer

Open-ended vessels are a characteristic feature of an open circulatory system, where the blood (or hemolymph in some organisms) is not always contained within vessels but can flow freely into the body cavity.