The Living World 8th Edition by George Johnson

تمرين 3

Which of the following is not a function of the vertebrate circulatory system?
A) regulation of body temperature
B) protection against injury, foreign toxins, and microbes
C) transportation of materials in the body
D) All of the above are functions of the circulatory system.
How do some vertebrates maintain body temperature in cold environments?
A) by mixing cold blood with warm blood in the heart
B) by pumping more warm blood to the extremities
C) by passing warm blood near cold blood in the extremities to warm the blood
D) Vertebrates use all of the above in cold environments.