Characteristics of Bacterial Cells

The tissue type composed of a layer, or layers, of closely packed cells that cover organ surfaces, line structures, and form glands is

epithelial

The tissue type that covers and protects surfaces, both inside and outside the body is called

epithelium

The tissue layers that gives rise to all the body's mature tissues are called the

Germ layer

Choose the embryonic germ layers.

Mesoderm Ectoderm Endoderm

Stratified epithelium

More than one layer of cells with only the deepest layer contacting the basement membrane

True or false: Pseudostratified epithelial tissue consists of many cell layers, therefore it is considered a stratified epithelium.

Pseudostratified epithelium consists of tall columnar cells and shorter basal cells. All cells resting on the basement membrane creating a false appearance of stratification. This is simple epithelium (one layer). Notice that all of the cells contact the basement membrane and extend to the free surface. T

What are the functions of epithelial tissue?

Secretion of substances Act as a barrier

What are the two criteria used to classify the different types of epithelial tissue?

Shape of epithelial cells Number of cell layers

Pseudostratified epithelium

Single layer of cells; all cells attach to basement membrane but not all cells reach the free surface.

Simple epithelium

Single layer; cells extend from basement membrane to free surface.

What type of tissue covers body surfaces and lines body cavities?

Epithelial

What class of tissue is capable of secretion and absorption of substances?

Epithelial tissue

An epithelium consisting of a single layer of cells in which all cells rest directly on the basement membrane is ______.

simple

The epithelium consisting of one layer of cells in which all cells rest directly on the basement membrane, but appear to be arranged in layers, is

simple or pseudostratified

An aggregation of cells and extracellular materials which performs a discrete function is known as a(n) ______.

tissue

Collections of specialized cells and extra-cellular substances around them are known as a(n)

tissue