Chapter 33

All vertebrates have __________. a. a closed circulatory system b. a two-chambered heart c. lungs d. all of the above

In __________, blood flows through two separate circuits. a. birds b. mammals c. fish d. both a and \(b\)

The __________ circuit carries blood to and from lungs.

The most abundant protein in plasma is __________. a. hemoglobin c. albumin b. fibrin d. collagen

Platelets function in _________. a. oxygen transport c. thermal regulation b. clotting of blood d. both a and \(b\)

Most oxygen in blood is transported ________. a. in red blood cells c. in platelets b. in white blood cells d. dissolved in plasma

Blood flows directly from the left atrium to ________. a. the aorta c. the right atrium b. the left ventricle d. the pulmonary arteries

Contraction of ___________ the aorta and pulmonary arteries. a. atria b. veins c. arterioles d. ventricles

Blood pressure is highest in the _______M and lowest in the ____________. a. arteries; veins c. veins; arteries b. arterioles; venules d. capillaries; arterioles

At rest, the largest volume of blood is in __________. a. arteries b. veins c. capillaries d. arterioles

Which heart chamber has the thickest wall? a. right atrium c. left atrium b. right ventricle d. left ventricle

A pulmonary ______ carries oxygen-poor blood. a. artery b. vein

Lymph nodes filter _________. a. blood c. plasma b. lymph d. all of the above

Which is more dangerous? a. atrial fibrillation b. ventricular fibrillation

Match the terms with their descriptions. ____capillary ____ lymph node ____atrium ____ventride ____SA node ____vein ____ aorta a. filters out pathogens b. cardiac pacemaker c. blood vessel with valves d. largest artery e. receives blood from veins \(\mathrm{f}\). exchange site \(\mathrm{g}\). receives blood from atrium