Tissues, Part 2 - Epithelial Tissue: Crash Course A&P #3

Avascular means

• There is blood supply

• There is no blood supply

How do we classify the epithelium tissue?

• shape of each cell and size of the cell

• shape of each cell and the number of layers they make

• size and function of the cell

• number of layers and job in the body

Squamous, cuboidal, and columnar are 

• the number of cell layers in a tissue sample

• the 3 sizes of the epithelium tissue

• the shape of epithelial cells

Why would you find squamous epithelium in your lungs?

• The cells are tall to allow gasses to pass through quickly.

• The cells are flat, so gasses can easily move through them.

• The cells are tall to hold organelles for creating enzymes.

• The cells are flat to hold hormones for secretions.

Why would we find columnar cells in the stomach?

• They need to be smaller to house organelles to produce mucous.

• They need to be smaller to house less organelles to make ATP.

• They need to be larger to house organelles to produce mucous.

• They need to be larger to house organelles to produce water.

The 3 general terms for cell layers in epithelium are:

• multi-layered, single-layered, and partially layered

• complex, simple, stratified

• simple, stratified, and pseudostratified

• squamous, cuboidal, columnar

Stratified Cuboidal Tissue means

• layers of columnar shaped cells

• single layer of squamous cells

• layers of cubed shaped cells

Stratified squamous tissue is ideal for lining the mouth and making up the skin because:

• These areas need to many cell layers thick and the cells take a lot of time to make

• These areas need to many cell layers thick and the cells are easy to make

• These areas are only on cell layer thick and are easily worn away.

The basal membrane holds the epithelium tissue together

• True 

• False

Glands are made up of epithelium tissue.

The 2 main kinds are

• exocrine and urinary gland

• endocrine and exocrine gland

• endocrine and reproductive gland