Are under low pressure

- contain the highest proportion of the blood in the cardiovascular system.

-The blood volume contained in the veins is called the unstressed volume.

- are innervated by autonomic fibers.

B. Velocity of blood flow

- can be expressed by the following equation:


v = velocity (cm/sec) Q = blood flow (ml/min) A = cross-sectional area (cm2)

- Velocity is directly proportional to blood flow and inversely proportional to the cross-sectional area at any level of the cardiovascular system.

- For example, blood flow velocity is higher in the aorta (small cross-sectional area) than in the sum of all of the capillaries (large cross-sectional area). The lower velocity of blood flow in the capillaries optimizes conditions for exchange of substances across the capillary wall.

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Anxiety and Depression 101

Anxiety and Depression 101

Everything you ever wanted to know about. We have been discussing depression and anxiety and how different information that is out on the market only seems to target one particular cure for these two common conditions that seem to walk hand in hand.

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