Chapter 33

Cells directly exchange substances with _____. a. blood vessels b. lymph vessels c. interstitial fluid d. both a and b

All vertebrates have _____. a. an open circulatory system b. a closed circulatory system c. a four-chambered heart d. both b and c

Which are not found in the blood? a. plasma b. blood cells and platelets c. gases and dissolved substances d. All of the above are found in blood.

A person who has type \(O\) blood _____. a. can receive a transfusion of blood of any type b. can donate blood to a person of any blood type c. can donate blood only to a person of type \(\mathrm{O}\) d. cannot be a blood donor e. both a and b

In the blood, most oxygen is transported _____. a. in red blood cells b. in white blood cells c. bound to hemoglobin d. both a and c

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. the atria b. arterioles c. the ventricles d. skeletal muscle

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 the _____. a. arteries b. capillaries c. veins d. arterioles

Which is not a function of the lymphatic system? a. filters out pathogens b. returns fluid to the circulatory system c. helps certain white blood cells mature d. distributes oxygen to the tissues

Match the components with their functions. a. filters out pathogens b. cardiac pacemaker c. main blood volume reservoir d. largest artery e. fluid connective tissue f. zone of diffusion g. contractions drive blood circulation capillary bed _____ lymph node _____ blood _____ ventricle _____ SA node _____ veins _____ aorta _____