APPLIED RADIOLOGICAL ANATOMY

ANATOMY

LYMPHATIC SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Valves in lymphatic capillaries open when pressure outside the capillary is:
A
High
B
Low
C
In equilibrium with the capillary
D
None of the above
Explanation: 

Detailed explanation-1: -As lymph capillaries collect interstitial fluid from tissues, the pressure in the lymph capillaries grows. This increasing pressure moves the lymph fluid forward toward the heart. Everywhere in your body, your lymphatic capillaries collect lymph and move it into larger lymphatic vessels.

Detailed explanation-2: -When fluid levels in the interstitial spaces increase, they create pressure which causes the flap-like structures of the capillary walls to open, allowing fluid to enter the lymph capillaries. The flaps may open up to several micrometres.

Detailed explanation-3: -Lymphatic Valves When the pressure of lymph fluid increase to a certain point due to filling with more lymph fluid or from smooth muscle contraction, the fluid will be pushed through the valve (opening it) into the next chamber of the vessel (called a lymphangion).

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