initiates the heartbeat by causing the atria to contract

conveys the stimulus to the ventricles, causing them to contract (systole)

(The muscles of the heart relax)

Conrtact of the ventricles

is the maximum pressure in the arteries

Blood flow in veins is caused by all the following except :

At the arterial end of a cardiovascular capillary, blood pressure is _____ than osmotic pressure

Plasma proteins (albumins, globulins, and fibrinogen) are mostly produced by the

prothrombin and fibrinogen

(RBC) production is controlled by the

The organ that is responsible for the production of the hormone erythropoietin (EPO)

Diseases involving RBCs

Are abundant, respond first to infections, and phagocytize pathogens

Granular leukocytes that are abundant, respond first to infections, and phagocytize pathogens

insufficient number of platelets

The majority of the carbon dioxide produced by cellular respiration is transported by the red blood cell (RBC) by

Skin has surface area about ____m²

Accounts for nearly _____of the body weight

Melanin is the primary pigment responsible for color