Unit 2 - Tissues

What is the function of epithelial tissue? Epithelial tissue is the ______ tissue that forms the boundary between our body and the external ______.

• lining, environment

• muscle, organs

• connective, skeleton

• nervous, system

What structures do all epithelial tissues share? The top surface of an epithelial tissue is called the ______ surface or ______ surface. The bottom surface is called the ______ surface. The membrane underneath the basal surface is called the ______ membrane. All of these tissues are ______ (no blood vessels). Epithelial tissues are classified by the number of ______ and the ______ of the cells.

• free, apical, basal, basement, avascular, layers, shape

• fixed, lateral, dorsal, connective, vascular, fibers, color

• smooth, ventral, posterior, elastic, muscular, rows, size

• loose, superior, anterior, fibrous, cellular, sheets, density

How do simple & stratified epithelial tissues differ?

• one layer vs multi-layer of cells

• multi-layer vs only one layer of cells

• Stratified epithelial cells changes when stretched

• Stratified epithelial cells looks multi-layer but isn't

Simple squamous epithelium: This is a ______, ______ layer of cells that is ______ and ______. Function: rapid diffusion of materials. Where is it found? ______ & ______.

• single, flat, thin, permeable, blood vessels, lungs

• multiple, cuboidal, thick, impermeable, skin, stomach

• single, columnar, rigid, flexible, heart, liver

• stratified, round, dense, elastic, kidney, intestine

Simple cuboidal epithelium: This is a ______ layer of ______-shaped cells. Where is it found? ______ of the ______.

• single, cube, tissues, kidney

• multiple, column, lining, heart

• single, flat, surface, lung

• multiple, cube, glands, liver

Simple columnar epithelium: This is a ______ layer of ______, closely packed cells. These cells may have ______ and ______ cells, which secrete ______. Function: secretion of mucus for protection & absorption of substances. Where is it found? ______ of the ______ tract.

• single, tall, cilia, goblet, mucus, lining, digestive

• multiple, flat, microvilli, squamous, enzymes, surface, respiratory

• single, cuboidal, flagella, basal, hormones, wall, urinary

• double, round, villi, chief, acid, base, circulatory

Epithelial tissue is the ______ that protects the body from the external ______. All epithelial tissues have a ______ surface, a ______ surface, and a ______ membrane. Simple epithelial tissues are made of ______ layer of cells that can vary in ______.

• lining, environment, free, basal, basement, one, shape

• muscle, organs, smooth, rough, connective, two, size

• barrier, air, upper, lower, plasma, three, color

• membrane, bacteria, outer, inner, cytoplasmic, four, function

Stratified squamous epithelium: These ______ layers provide protection for the underlying layers.

• thick

• thin

• loose

• fragile

Stratified squamous epithelium: Found where? ______ layers of the skin.

• epidermal

• dermal

• subcutaneous

• muscular

Stratified cuboidal epithelium: More than one layer of ______ cells. They are______ in the body and are found in the ______ & mammary glands.

• cuboidal, rare, salivary

• squamous, common, sweat

• columnar, abundant, sebaceous

• transitional, widespread, tear