Which of the Following Statements About Sinusoids is TRUE

Question

Which of the following statements about sinusoids is TRUE?
A) Their walls have large intercellular clefts that allow proteins and blood cells to pass between tissue and the bloodstream.
B) Sinusoids are found in the liver, spleen and red bone marrow.
C) Sinusoids function as capillaries, but are wider and more winding than other capillaries.
D) All of the choices are correct.

Accepted Answer

Sinusoids are specialized capillary vessels that are wider and more winding than typical capillaries, and they do have large intercellular clefts that allow for the passage of proteins and blood cells between tissues and the bloodstream. They are indeed found in organs such as the liver, spleen, and red bone marrow, where this high permeability is necessary for their specific functions.