SHUPA Physiology - Circulation

This side of the heart has larger structures that are less muscular and capable of storing blood

• Arterial

• Venous

After the blood is pumped out of the heart, if flows through the aorta, followed by these three structures, listed from largest to smallest…

• Arteries, capillaries, arterioles

• Arteries, arterioles, capillaries

• Arterioles, arteries, capillaries

• Capillaries, arterioles, arteries

What are the functions of the capillaries?

• Store blood

• Pump blood

• Exchange of nutrients

• Determine flow

Approximately how much blood is pumped throughout the body per minute?

• 3L

• 4L

• 5L

• 6L

This side of the heart has higher pressure and is responsible for delivering blood to the body through arteries, arterioles, and capillaries.

• Right

• Left

This is controlled by local mechanisms in response to nutrient needs and varies greatly between different tissues and organs

• Blood flow

• Blood pressure

This type of circulation has lower pressure, typically around 25/8 with ~7mmHg in the capillaries

These peripheral structures are considered the controllers of our blood pressure, which is predominantly determined by a change in diameter

• Arteries

• Arterioles

• Capillaries

• Veins

Although the smallest structures in the circulatory system, they have the greatest cross-sectional area at approximately 2,500cm^2

• Small arteries

• Venules

• Small veins

• Capillaries

Velocity is fastest in this structure at approximately 33cm/second

• Venae cavae

• Aorta

• Arterioles

• Capillaries