BIOL 220: Tissues -Epithelial Tissue2.2

These flashcards cover key concepts, definitions, and examples related to epithelial tissue, providing a comprehensive review for preparation for the exam.

What are the four types of tissues in the human body?

Epithelial, connective, muscle, and nervous tissue.

What is epithelial tissue characterized by?

Tightly packed layers of cells that are avascular and have a surface exposed to either the outside world or internal bodily fluids.

What are the primary functions of epithelial tissue?

Protection, secretion, absorption, and forming a barrier to control substance movement.

What are the two major types of epithelial tissues?

Covering and lining epithelium, and glands.

What is the basement membrane?

A supportive layer that is not part of epithelial tissue but underlies it.

Define apical surface in relation to epithelial tissue.

The surface of the epithelial tissue that is exposed to the external environment or the lumen of an organ.

What distinguishes exocrine glands from endocrine glands?

Exocrine glands secrete into ducts, while endocrine glands secrete directly into the bloodstream.

What are the classifications of covering and lining epithelium?

Simple, pseudostratified, and stratified.

Give an example of simple squamous epithelium and its function.

Found in blood vessels and alveoli; facilitates quick exchange of gases.

What types of cells are found in simple cuboidal epithelium?

Cuboidal epithelial cells; examples include kidney tubules and surface of ovaries.

What is unique about simple columnar epithelium?

It often contains goblet cells which secrete mucin, and it can be ciliated.

Differentiate between keratinized and non-keratinized stratified squamous epithelium.

Keratinized epithelium contains layers of dead cells and is found in the skin, while non-keratinized is found in moist areas like the mouth and esophagus.

What is transitional epithelium and where is it found?

It is similar to stratified squamous epithelium with rounded apical surfaces, found in the urinary tract.