BLG 10A/B Lecture Notes - Lecture 4: Stratified Squamous Epithelium, Simple Squamous Epithelium, Intestinal Epithelium

• School: Ryerson University
• Department: Biology
• Course: BLG 10A/B
• Professor: Emily Agard

Document Summary

4. 2): apical (or luminal) surface = free surface not attached to any other cells faces external environment (atmosphere) or internal environments such as fluid in tubes, microvilli (fig. 4. 3c)= finger-like extensions of the plasma membrane - increase surface area: note: the microvilli are so dense in the first portion of the kidney tubule that it appears fuzzy called the (cid:862)brush border(cid:863) cilia (fig. 4. 3b) function = secretion and absorption form walls of smallest ducts of glands and many kidney tubules: simple columnar epithelium (fig. 4. 3c: absorption and secretion lines digestive tract from stomach to rectum, dense microvilli and apical surface tubular glands that secrete mucus-containing intestinal juice, pseudostratified (pseudo = false) columnar epithelium (fig. 2: unicellular exocrine cells, mucous cells and goblet cells (fig. Connective tissue proper four main classes: connective tissue proper, cartilage, bone, and blood - and several subclasses somewhat arbitrary based on type and proportions of cells and extracellular matrix components.