CAS BI 108 Lecture Notes - Lecture 3: Stratified Squamous Epithelium, Simple Squamous Epithelium, Epithelium

• School: Boston University
• Department: Biology
• Course: CAS BI 108
• Professor: Kathryn Spilios

Document Summary

Protection, absorption, filtration, excretion, secretion, sensory reception. Epithelium = sheet of cells that covers a body surface or lines a body cavity. Gland = one or more cells that make and secrete a product. Two types: endocrine = secrete products internally, exocrine = secrete products onto body surfaces. Found everywhere in the body, most abundant tissue. Structural elements of connective tissue: ground substance, fibers, collagen fibers (white fibers, elastic (yellow fibers, reticular, cells (undifferentiated, fibroblast, chondroblast, osteoblast, hemocytoblast, other cells in matrix, fat cells, macrophages, plasma cells. Three factors determine connective tissue type: cell types, fiber types, proportion that is matrix, connective tissue proper: main connective tissue, two subclasses, loose connective tissue (areolar, adipose, reticular, dense connective tissue (dense regular, dense irregular, elastic) Cartilage: between dense con. and bone, surrounded by perichondrium, main cell type chondroblasts cartilage growth: interstitial growth, appositional growth. Chondrocytes = mature cartilage cells, found in hollow cavities in cartilage called lacunae.