KAAP220 Lecture Notes - Lecture 4: Microfilament, Mesothelium, Tight Junction

• School: University of Delaware
• Department: Kinesiology & Appl Physiology
• Course: KAAP220
• Professor: Jamie Pigman

Document Summary

Fundamentals of anatomy and physiology chapter 4. Tissue level of organization: epithelial tissue, covers exposed surfaces, forms secretory glands. Lines internal passageways and chambers: connective tissue, fills internal spaces, provides structural support, stores energy, muscle tissue, contracts to produce movement. Includes skeletal muscle, cardiac muscle, and smooth muscle: nervous tissue, conducts electrical impulses, carries information. Lines internal cavities and passageways: covers exposed surfaces, avascular, contain secretory or gland cells scattered among other cell types. Connective tissue: glands, derived from epithelia, predominantly secretory cells, two types, exocrine glands secrete onto external surfaces or into ducts, endocrine glands, secrete hormones into interstitial fluid, hormones then distributed by bloodstream. Features of epithelial tissues: surfaces, apical surface, base faces exterior of body or internal space, attached to underlying tissues, basolateral surface includes base and sides (lateral surface) attached to neighboring cells, apical surface features. Types of intercellular connections: desmosomes, hemidesmosomes, tight (occluding junctions, adhesion belts, gap junctions.