Which substance can lymphatic capillaries absorb?

Lymphatic capillaries play a crucial role in the lymphatic system, which is part of the immune system and contributes to fluid balance in the body. One of their primary functions is to absorb excess interstitial fluid, which contains various substances. Large particles, such as proteins, dead cells, and waste products, are often too large to be absorbed by typical blood capillaries. Lymphatic capillaries, unlike blood capillaries, have a more permeable structure, allowing them to absorb these larger particles effectively.

The absorption of proteins and dead cells is essential for maintaining homeostasis and aiding in the immune response. The lymphatic system transports these absorbed materials back to the bloodstream, where they can be properly processed and eliminated by the body.

The other options do not accurately reflect the function of lymphatic capillaries. Red blood cells, for instance, are generally confined to blood vessels and are not absorbed by lymphatic capillaries. Pure oxygen and carbon dioxide, on the other hand, are gases that are exchanged through respiratory pathways rather than being absorbed by lymphatic capillaries. Thus, large particles like proteins and dead cells are the correct substances that lymphatic capillaries can absorb, highlighting their essential role in maintaining