Anatomy series (part 2)

As promised, The WM will be offering an anatomy series and here is part 2! Today’s featured organ is the spleen.

The spleen is known as the “odd” organ. That is, the odd-numbered organ. To describe the anatomy of the spleen, all you have to know are the numbers 1, 3, 5, 7, 9, 11.

  • The spleen is 1 inch x 3 inches x 5 inches in dimensions
  • The spleen is usually about 7 ounces in weight
  • The spleen is found under ribs 9 and 11 (i.e. its surface anatomy)

Remember: the spleen is tucked below the diaphragm. You will only feel it on your physical exam if it is enlarged.

Last fact of the week: massive splenomegaly is felt 8 cm below the costal margin and weighs more than 1kg (!!).

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