Thursday, October 14, 2010

Tissues

These pictures represent the different types of tissues found throughout the body. We took these pictures in my 6th hour class.

Pseudostratified Columnar Epithelium
Has cells of different heights and sizes, this gives the false
impression that it has several layers.
Found in the lungs and other places where mucus needs to be
pushed away.
Simple Columnar Epithelium
Seen as a single layer of tall, closely packed cells. Mostly used
for absorption and secretion.
Found in tubes and other passage ways.
Simple Cuboidal Epithelium
Made of tall and wide cells arranged in single a single layer.
  Important function is secretion and absorption.
  Forms the walls of small ducts of glands and kidney tubules.
Simple Squamous Epithelium
Flat single layered cells that are laying laterally, their goal is
to reduce friction.
They are found in the air sacs in the lungs, the lymphatic
system, and the lining of the heart.
Stratified Columnar Epithelium
Very limited in the body, but occur at transition areas.
Found in the pharynx, the male urethra, and lining of some
glandular ducts.
Stratified Cuboidal Epithelium
 Typically two layers of cuboidal cells.
Rare in the body, found in sweat and mammary glands. 

Stratified Squamous Epithelium
Single layered cells, the lining reduces friction.
Forms the skin and a short distance into every body opening.
Transitional Epithelium
Several different layers of different cell types. Surface cells
are dome like and can stretch. The basal cells are cuboidal
or columnar.
Found in the lining of hollow urinary organs.

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