Re: Are sperm and egg cells the only haploid cells in the human body?

Dear Wayne,

The textbook was partially correct. All ova and spermatozoa are haploid and 
they are the only haploid cells in the body. About 50% of liver cells are 
diploid, however, the remainder have a higher ploidy and you can recognize 
them by the size of their nuclei. The diploid hepatocytes have the smallest 
nuclei and the 64-ploid cells have the largest nuclei. There are some other 
cell types that are poliploid, such as the megakaryocytes and, as you know, 
there are also cells that have no nuclei, namely the erythrocytes.

A good reference would be : Gartner and Hiatt: Color Textbook of Histology, 
W.B. Saunders, 1997.

I hope that this helps.

Les Gartner
Anatomy
Dental School
University of Maryland,
Baltimore, MD