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Chapter 1 Test Histology Epithelial tissue Keep on beginning and failing. Each time you fail, start all over again, and you will grow stronger until you have accomplished a purpose - not the one you began with perhaps, but one you ’ ll be glad to remember Anne Sullivan.
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Chapter 1 Test Histology Epithelial tissue Keep on beginning and failing. Each time you fail, start all over again, and you will grow stronger until you have accomplished a purpose - not the one you began with perhaps, but one you’ll be glad to remember Anne Sullivan To assess knowledge of preliminary information and begin learning about histology Title: Anat & Phys 8/30/06 Class Topics Objectives: Thursday, December 19, 20193:40 PM
Class Assignments What By When • Chapter 1 Test 8/30/06 • Read 80-111 9/12/06 • Due this class period • Due next class period • Due in the future
Posttest Activities • Hand in the test • Read Chapter 4
Epithelial Tissue • Simple squamous • Simple cuboidal • Simple columnar • Stratified squamous • Stratified cuboidal • Pseudostratified columnar • Transitional http://trc.ucdavis.edu/mjguinan/apc100/modules/TermsCells&Tissues/_topics.html
Simple Squamous • Flattened cells • all cells have a free surfaces and are attached to basement membrane • Usually lining blood vessels, air sacs of lungs http://trc.ucdavis.edu/mjguinan/apc100/modules/TermsCells&Tissues/ epithelial/simplesquamous/simplesquamous.html
Stratified Squamous • Multiple layers of cells • Resist wear and tear • Categorized by shape of surface cells • Top layer are flat (Squamous) • Esophagus, oral cavity • Outer layer of skin • Keratinized
Simple Cuboidal • Single layer of cube-shaped cells • Many times will have cilia or microvilli • Found in tubes or ducts • kidneys, liver, and many glands
Simple Columnar • Elongated cylindrical cells • nucleus near the bottom (basement membrane) • Found in wall of uterus, small intestine • may contain microvilli
Pseudostratified Columnar • Looks layered, really not • all cells anchored to basement membrane • Cell shape not uniform • nucleus placement not uniform • If cilia are present • Pseudostratified ciliated columnar epithelium • Found in respiratory tract
Glandular Epithelium • Secretion of a product • goblet cells • found in PSCC and columnar epithelium • secrete mucus • Glands • endocrine - inside the body • exocrine - outside the body
Connective Tissue • Keeps other tissues in place • Protein fibers found in C.T. • 1. Collagen • thick - resists stretching (tensile strength) • Tendons and ligaments, scar tissue • 10% of human’s weight
Connective Tissue • 2. Elastin • Elasticity and Extensibility • can stretch and return to original shape • skin • 3. Reticulin • very thin • not prominent
Connective Tissue • Fig. 4-2 p. 91 • Many types of connective tissue