The pericardium helps prevent overfilling of the heart and it lessens the friction of movements during heartbeats.

23. This intaglio process employs acid to mar the surface of a metal plate. 

The carotid bodies contain _________ chemoreceptors that respond to changes in ________________.

The opening and closing of the heart valves is caused by

Interleukin 1 and interferons act as

The membrane of a contractile cardiac muscle cell contains

A fever __________ reproduction of bacteria and ___________ CAMs on the endothelium of capillaries of lymph nodes.

Cytotoxic T-lymphocytes destroy infected cells by releasing

An actively contracting muscle will cause local temperature to rise and will produce acidic molecules. Warmth and lower pH cause the oxygen-hemoglobin saturation curve to shift ______ reflecting that hemoglobin releases ______ oxygen.

Norepinephrine is considered a positive chronotropic agent because it causes