Exam 2 Study Guide, Chapters 5 & 6
There are only four primary tissue types found in adult organs; epithelial, connective, nervous, and muscular tissue.
Epithelial tissue lines body cavities, covers the body surface, and forms the lining of many organs.
Connective tissue serves in most cases to bind organs to each other.
Nervous tissue and muscular tissue are considered excitable tissues because they are very sensitive to outside stimuli.
A simple epithelium consists of a single layer of cells with every cell touching the basement membrane.
A stratified epithelium consists of 2 or more layers of cells with only the deepest layer of cells touching the basement membrane.
The cells of an epithelium can be squamous (flat), columnar (tall and narrow), or cuboidal (round or cubed).
Goblet cells are unicellular glands that produce the protective mucous coatings which cover the mucous membranes. They are usually found scattered throughout a simple columnar epithelium.
A keratinized epithelium has a surface layer of dead cells. The epidermis is a keratinized stratified squamous epithelium.
A nonkeratinized epithelium lacks the surface layer of dead cells but provides a moist and slippery surface that is well suited to resist stress. The vagina, tongue, and esophagus consist of a nonkeratinized stratified epithelium.
Cartilage is a supportive connective tissue with a flexible rubbery matrix. Differences in the fibers provide a basis for classifying cartilage into three types: hyaline cartilage, elastic cartilage, and fibrocartilage. Hyaline cartilage makes up the tip of our nose. Elastic cartilage is what gives the shape to our external ear. Fibrocartilage is found in the intervertebral discs.
Dense regular connective tissue is named for two properties; the collagen fibers are closely packed and leave relatively little open space, and the fibers are parallel to each other. Collagenous fibers are very abundant in tendons and