Tissues

I. Introduction A. Introduction 1. Cells argon organized into layers or groups of convertible booths with a green function called tissues. 2. The four major types of tissues of the clement body atomic number 18 epithelial, connection, muscle, and nervous. II. epithelial Tissues A. normal Characteristics 1. Epithelium covers the body surface and organs, forms glandular tissues and lines internal organs. 2. epithelial tissue always has a submit surface. 3. The underside of epithelial tissue is anchored by a cellar membrane to connective tissue. 4. epithelial tissue lacks blood vessels. 5. Because epithelial tissue cells dissociate rapidly, its injuries heal rapidly. 6. Epithelial cells be tightly packed. 7. In numerous places, desmosomes attach epithelial cells together. 8. Epithelial cell functions include protection, secretion, absorption, and excretion. 9. Epithelial tissues are classified according to the become and n umbers of layers of cells. 10. Squamous cells are thin and flat, cuboidal cells are cubelike, and columnar cells are elongated. 11. Epithelial tissues with single layers of cells are simple and those with deuce or more(prenominal) cell layers are stratified. B. uncomplicated Squamous Epithelium 1. round-eyed squamous epithelial tissue consists of 1 layer of flat cells. 2.

Substances pass considerably by means of simple squamous epithelium. 3. Examples of places you find simple squamous epithelium are alveoli of lungs and walls capillaries. C. childly Cuboidal Epithelium 1. undecomposable cuboi dal epithelium consists of principal layer ! of cube-shaped cells. 2. Simple cuboidal epithelium is buckram lining the follicles of the thyroid glands, covering the ovaries, and lining kidney tubules and ducts of certain glands. D. Simple Columnar Epithelium 1. Simple columnar epithelium is undisturbed of one layer of elongated cells. 2. The cells of simple columnar back tooth be ciliated or nonciliated. 3. Cilia extend from the free surfaces and impinge on constantly. 4. Cilia tending in moving eggs...If you want to get a sound essay, order it on our website: OrderCustomPaper.com

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