5 Questions
What is the diameter range of small arteries and arterioles within tissues and organs?
1 to 2 mm
What is the main function of capillaries in the exchange of substances between blood and tissues?
Ideal for the exchange of diffusible substances
Which type of vessels have the highest density in tissues with high metabolic rates such as myocardium and brain?
Capillaries
Where does blood from capillary beds flow into?
Postcapillary venules
In most forms of inflammation, where does vascular leakage and leukocyte exudation occur preferentially?
Postcapillary venules
Study Notes
Blood Vessel Characteristics
- Small arteries and arterioles within tissues and organs have a diameter range of 10-100 μm.
Capillary Function
- The main function of capillaries is to facilitate the exchange of substances between blood and tissues through diffusion and osmotic pressure.
Vessel Density
- Arterioles have the highest density in tissues with high metabolic rates, such as the myocardium and brain, due to their high oxygen demands.
Blood Flow
- Blood from capillary beds flows into venules.
Inflammation
- Vascular leakage and leukocyte exudation occur preferentially in post-capillary venules during most forms of inflammation.
Test your knowledge of blood vessel anatomy and histology with this quiz covering topics such as vascular anomalies and the vascular wall response to injury. Review important concepts related to large or elastic arteries, including the aorta, innominate, subclavian, common carotid, iliac, and pulmonary arteries.
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