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NAME____________________________________ LAB TIME/DATE _______________________
S H E E T
Classification of Tissues
Tissue Structure and Function—General Review
A group of cells similar in structure and function. 1. Define tissue. _______________________________________________________________________________________ __________________________________________________________________________________________________ 2. Use the key choices to identify the major tissue types described below. Key: a. b c c, d a b d c b a a a d connective tissue b. epithelium c. muscle d. nervous tissue
1. lines body cavities and covers the body’s external surface 2. pumps blood, flushes urine out of the body, allows one to swing a bat 3. transmits electrochemical impulses 4. anchors, packages, and supports body organs 5. cells may absorb, secrete, and filter 6. most involved in regulating and controlling body functions 7. major function is to contract 8. synthesizes hormones 9. the most durable tissue type 10. abundant nonliving extracellular matrix 11. most widespread tissue in the body 12. forms nerves and the brain
Typically has a high capacity for regeneration. Avascular. Cells 3. Describe five general characteristics of epithelial tissue. _____________________________________________________ fit closely together forming sheet-like membranes. Membrane has a free, exposed edge. Little intercellular material between cells.
4. On what basis are epithelial tissues classified? Cell shape and number of layers.
5. List five major functions of epithelium in the body, and give examples of each. protection skin Function 1: ______________________________________ Example: __________________________________________ cells that line the digestive tract absorption Function 2: ______________________________________ Example: __________________________________________ glandular cells secretion Function 3: ______________________________________ Example: __________________________________________ kidney tubule cells filtration Function 4: ______________________________________ Example: __________________________________________ free endings of sensory neurons sensory reception Function 5: ______________________________________ Example: __________________________________________ Stratified epithelia have more 6. How does the function of stratified epithelia differ from the function of simple epithelia? ___________________________ layers for protection; simple are more permeable and less protective.
7. Where is ciliated epithelium found? In the upper portion of the respiratory tract and lining the trachea.
What role does it play? It keeps mucus and debris from entering the lungs by sweeping in an upward direction.
8. Transitional epithelium is actually stratified squamous epithelium with special characteristics. How does it differ structurally from other stratified squamous epithelia? When stretched the cells appear flat and irregular, typical of stratified squamous; when xxxxx not stretched they appear cuboidal. contra How does the structural difference support its function? The surface cells are able to slide over one another and maintain an intact lining as the organ fills and the internal volume changes (e.g., urinary bladder)
Endocrine glands are ductless, they produce 9. How do the endocrine and exocrine glands differ in structure and function? ______________________________________ hormones that enter the bloodstream after being released into the extracellular fluid. Exocrine glands produce secretions such as perspiration, oil, and digestive enzymes and pass them through membranes or the skin through ducts.
10. Respond to the following with the key choices. Key: a. pseudostratified ciliated columnar b. simple columnar e c c. simple cuboidal d. simple squamous e. stratified squamous f. transitional
1. lining of the esophagus 2. lining of the stomach...
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