In comparing the bird circulatory system to the mammal circulatory system,the bird system has
A)a cross vein in the neck to keep blood flowing to the brain as the head is turned.
B)a much faster heartbeat.
C)the right aortic arch,instead of the left as in mammals,leading to the dorsal aorta.
D)larger arteries to the wings and breast.
E)All of the choices are correct

Question

Quizplus · Accepted Answer

All of these choices are correct. The bird circulatory system has several unique adaptations, including the presence of a cross vein in the neck to maintain blood flow to the brain during head movements, a faster heartbeat to support the high metabolic demands of flight, a different arrangement of the aortic arches, and larger arteries to the wings and breast to deliver oxygenated blood to the flight muscles.

In Comparing the Bird Circulatory System to the Mammal Circulatory