Chapter 33

All vertebrates have ___________. a. an open circulatory system b. a two-chambered heart c. lungs d. none of the above

In ____________ blood flows through two completely separate circuits. a. birds b. mammals c. fish d. both a and b

The ________ circuit carries blood to and from lungs.

The fluid portion of blood is ___________.

Platelets function in _______. a. oxygen transport b. hemostasis c. thermal regulation d. both a and b

Most oxygen in blood is transported ______________. a. in red blood cells b. in white blood cells c. the right atrium d. the pulmonary arteries

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

Contraction of ____________ drives the flow of blood through the aorta and pulmonary arteries. a. atria b. ventricles

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

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

Which human heart chamber has the thickest wall?

A pulmonary ______________ carries oxygen-poor blood.

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

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

Match the components with their functions. _________capillary _________lymph node _________atrium _________ventricle _________SA node _________veins _________aorta a. filters out pathogens b. cardiac pacemaker c. vessels with valves d. largest artery e. thin-walled heart chamber f. exchange site g. contractions drive blood circulation