Transcript lec3
Today - Histology • 1 handout today • Quiz #1 available today at 3pm until Monday at 11pm • Quiz #1 available Friday 3pm until Monday at 11pm • 10 minutes, 5 questions • 1 question = 1 point • you can only take it once • don’t open it until you are ready to take it! • be sure to hit submit when you are finished • submit before time runs out • open book but not a group effort! Epithelial tissue Connective tissue Cells + matrix = tissues 1. 2. 3. 4. Epithelial tissue Connective tissue Muscle tissue Nervous tissue simple stratified squamous cuboidal columnar Goblet cells ciliated Pseudostratified columnar Stratified squamous Transitional (stratified) Simple or stratified • Squamous • Cuboidal • Columnar • Pseudocolumnar • Glands? 1. esophagus 2. stomach 3. Small intestine 4. Large intestine 5. rectum 1. Esophagus: food passageway 2. Stomach: mechanical & chemical breakdown of food 3. Small Intestine: absorption & secretion 4. Large intestine: some absorption 5. Rectum: passageway for waste Connective Tissue Three types • Fibrous • Supportive • Fluid General Functions: 1. Binds organs 2. Support 3. Protection 4. Immune protection 5. Movement 6. Storage 7. Heat 8. Others….. Cells + fibers + ground substance = connective tissue Cells = fibroblasts Fibers = elastin & collagen Reticular fibers Cells = fibroblasts Fibers = collagen & elastin Change composition = change function loose dense regular mesentery Tendons & ligaments irregular Areolar tissue skin Fibrous connective tissue type and function Supportive connective tissue = cartilage & bone Cells: chondrocytes Fibers: collagen & elastin GS: GAG’s Perichondrium: dense, irregular CT with chondroblasts hyaline elastic fibrocartilage • chondrocytes • collagen & elastin fibers • GAG’s Bone Cells: osteocytes Fibers: collagen Matrix: GAG’s & minerals Central canal = blood vessel Surrounded by periosteum Nervous tissue • neurons & glia • electrical & chemical signals Muscle tissue • muscle fibers • contract when stimulated • skeletal, smooth & cardiac Glands = cell or organ that secretes something Exocrine glands • secrete stuff to surface • body surface or organ • sweat, tear, mammary, goblet cell Endocrine glands • secrete stuff into blood • stuff = hormones Membranes line & cover viscera • cutaneous • mucous • serous Mucous membrane Differentiation Metaplasia ** don’t forget about quiz #1! Available until Monday at 11pm