Primitive Circulation

Vertebrate Circulation

Vessel Structure

Blood Composition

Circulatory Route Review Put the following structures in the order that an erythrocyte may pass through if it starts in a capillary in your great toe: R Ventricle Pulmonary Vein L Atrium LungAorta L Ventricle Inferior (Posterior) Vena Cava R Atrium Pulmonary Artery

Cardiac Cycle

Cardiac Output Heart Rate Avg rate is about 70 bpm Avg rate is about 70 bpm Stroke Volume About 75 mL About 75 mL Average Output = 5.25 L/min This is about equal to the volume of blood in the human body This is about equal to the volume of blood in the human body

Heart Rate

Blood Pressure Venous circulation is mainly powered by… Smooth muscle Smooth muscle Constriction of veins from skeletal muscle movement Constriction of veins from skeletal muscle movement Valves keep blood from moving backward

Measuring Blood Pressure