Chapter 33

All vertebrates have _______________. a. a closed circulatory system b. a two-chambered heart c. lungs d. hemolymph

In ______________ blood flows through a single circuit. a. birds b. mammals c. fishes d. amphibians

The _______________ circuit carries blood to and from lungs.

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

Platelets function in ____________ . a. oxygen transport b. blood clotting c. thermal regulation d. defense against worms

Most oxygen in blood is transported ___________. a. in red blood cells b. in white blood cells \(c\), in platelets d. dissolved in plasma

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. veins c. arterioles d. ventricles

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

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

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 terms with their descriptions. a. filters out pathogens b. cardiac pacemaker c. blood vessel with valves d. largest artery e. receives blood from veins f. exchange site g. receives blood from atrium capillary lymph node atrium Ventricle SA node vein aorta