_____ capillaries are the most permeable and have macrophages which inhabit the lining and engulf bacteria that might try to cross the capillary wall.

The coronary arteries _____.

Atrioventricular valves are anchored to papillary muscles by _____, which holds valves in a closed position during ventricular systole.

_____ are lymphoid cells that can capture antigens and then deliver them to the lymphocytes in lymph nodes.

Which of the following is a function of the lymph nodes?

Which of these granulocytes contain histamine, a pro-inflammatory chemical, in its granules?

List the structures that an electrical signal would pass through as it traveled through the heart starting with the SA node.

The _____ pumps blood into the pulmonary trunk.

Increased blood pressure causes elimination of more water in urine, whereas decreased blood pressure causes kidneys to conserve water; both of these situations are examples of _____.

A patient is administered calcium channel blockers to reduce the contractility of the heart. Lowered contractility produces an effect on _____ which is also reduced.