Here's something to put our lives on Earth into perspective. Also, a wonderful illustration of the power of statistics done right.
Monday, January 3, 2011
It's a spleen
(sorry for the extremely late update)
Specifically, this is the red pulp of the spleen. Below is a lower power view of the red pulp with white pulp in the upper left. Remember, in an H & E section, white pulp stains dark purple. This is due to the presence of WHITE blood cells (mainly lymphocytes) that surround the central arterioles. Many students think that "white" pulp means the lighter staining part of the spleen. Don't make that mistake. Red pulp often looks "lighter" due to the presence of the splenic sinuses (white spaces), but red pulp also usually has brownish staining (lipofuscin) cells as well as red blood cells present.
The lipofuscin is found within the splenic macrophages that are responsible for taking up and destroying worn-out red blood cells.
Specifically, this is the red pulp of the spleen. Below is a lower power view of the red pulp with white pulp in the upper left. Remember, in an H & E section, white pulp stains dark purple. This is due to the presence of WHITE blood cells (mainly lymphocytes) that surround the central arterioles. Many students think that "white" pulp means the lighter staining part of the spleen. Don't make that mistake. Red pulp often looks "lighter" due to the presence of the splenic sinuses (white spaces), but red pulp also usually has brownish staining (lipofuscin) cells as well as red blood cells present.
The lipofuscin is found within the splenic macrophages that are responsible for taking up and destroying worn-out red blood cells.
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