BIOL 20300 Lecture Notes - Lecture 3: Homeostasis, Trachea, Male Reproductive System

• School: Purdue University
• Department: Biological Sciences
• Course: BIOL 20300
• Professor: Bridges David,

Document Summary

Topics: types of tissues in the body, epithelial tissue. Endocrine and exocrine glands develop from epithelial tissue. Commonalities: structurally polarized, non-vascular, tightly packed together. Tissue is anchored by the basement membrane: contains collagen iv, laminin, and proteoglycans. Arrangement: simple- one layer, stratified- 2 or more layers, pseudostratified- appears to have many layers, but only one layer. Shapes: squamous- thin, flat cells, cuboidal- like dice, cubes, columnar- width of cell shorter than height. Simple squamous epithelium: function: diffusion of substances, location: alveoli of lungs, lining of blood vessels/body cavities/ visceral organs. Simple cuboidal epithelium: function: absorption, secretion, and excretion, location: female ovaries, lens of eye, kidney. Simple columnar epithelium: function: helps food/ substances flow easier, location: stomach, nasal sinuses, microvilli- increases surface area, goblet cells- create mucus so it is easier to secrete substances (lubrication) Pseudostratified columnar: function: removing of waste, location: trachea, male reproductive system, cilia- hair-like structures that secrete things, goblet cells.