In a simple model of a resting limb, 30 mL of fluid leaves the blood capillaries each hour…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In a simple model of a resting limb, mL of fluid leaves the blood capillaries each hour. The capillaries take back mL. The rest drains into the lymph vessels.
- How much lymph forms in one hour?
- How much lymph forms in hours?
- Name the vessels of the intestine that take fats into the lymph.
Need a reminder? The key ideaShow
A clot is a net of fibrin with blood cells trapped in it. Prothrombin becomes thrombin, with Ca, and thrombin changes fibrinogen to fibrin. Tissue fluid that does not return to the capillaries is collected by the lymph vessels. Lymph is colourless, holds lymphocytes, and returns to the large veins.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Leaves: mL an hour. Returns to the capillaries: mL an hour.
Plan. The rest is the lymph.
Step 1. One hour. mL.
Step 2. Twenty-four hours. mL.
Step 3. The vessels. The lacteals in the villi.
Answer: mL; mL; lacteals.
Check. The lymph is a small share, of what leaves the capillaries.
Watch out. The numbers of the limb are chosen to show the method. In the whole body of a healthy adult, about to L of lymph forms in a day.
Source. Moore and Bertram (2018), Annual Review of Fluid Mechanics, 50, 459 to 482.
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