Animal Cells

This is a low-magnification picture of squamous epithelium (cheek cells). The cells have been stained to make them more visible. Note that the cells have definite shapes, which are determined by the cytoskeleton.

This is a high-magnification of the cheek cells in the photo at the left. The nuclei are prominent in the center of the cells.

This is a smear of human blood cells that have been stained with Wright's stain. Most of these cells are red blood cells, or erythrocytes, that appear blue in this slide. Human red blood cells are disc-shaped, and mature cells have no nucleus. Please note that this does NOT make them prokaryotic, since they did have a membrane bounded nucleus early in development, and still retain eukaryotic cell structure! The three cells with blue inclusions are white blood cells (leukocytes). The rightmost cell, with its nucleus almost completely filling the cell, is a lymphocyte, and the other two are neutrophils - also known as PMNs. The lumpy blue regions are the nucleus, which is divided into lobes.

This is section of adipose tissue, or fat cells. These cells store fat in a large vacuole that occupies most of the cell's volume. The dark, stringy material that seems to make up a network is actually cytoplasm, and the dark spots are nuclei.