Test 3 Review: Blood Vessels, Lymphatics, and Nervous Systems 1,Be able to state

Question

Test 3 Review: Blood Vessels, Lymphatics, and Nervous Systems

1,Be able to state and describe the anatomy for arteries, arterioles, capillaries, venules, veins, and portal vessels. What is the function for each? (be specific)

2,Be able to explain the differences between collateral circulation, anastomosis, and non-anastomosis

3,Be able to state the anatomy and function(s) for tonsils, thymus gland, spleen, and lymph nodes

4,Be able to explain the various methods for moving lymph through the lymphatic system and returning the fluid back to the blood stream

5, Be able to explain the role of the thoracic duct and right lymphatic duct

Explanation / Answer

2.

Anastomosis-an open connection between two cavities or vessels.Anastomoses occur normally in the body in the circulatory system, serving as backup routes for blood to flow if one link is blocked or otherwise compromised.Example : Circle of Willis .

Any lack of such continuity to blood flow/content would result in vessel/viscera ending into blind sac/pouch and can be referred to as Non-Anastamosed. Anastomosis literally means “without mouth”.

Collateral Circulation:This is a process in which small (normally closed) arteries open up and connect two larger arteries or different parts of the same artery. They can serve as alternate routes of blood supply.
Everyone has collateral vessels, at least in microscopic form. These vessels normally aren't open. However, they grow and enlarge in some people with coronary heart disease or other blood vessel disease (such as in the case of stroke) and redirect blood through them to maintain perfusion.

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