Cell Diversity Tissue Diversity Classification of Body Membranes

Cell Diversity Tissue Diversity Classification of Body Membranes

An average human body are made up of 200+ different cell types These vary greatly in size, shape and function All are derived from one single cell type: stem cell For simplicity, we will categorize these cells base on their functions Anatomy: The study of the parts (eg. cells, tissues, organs, systems) of an organism Physiology: The study of the functions of the parts of an organism

fibroblastserythrocytes a) connect body part b) cover and line body organs epithelial cells c) move organs and body parts muscle cells d) store nutrients fat cells f) gather info & control body functions nerve cells e) fight disease macrophage g) involve in reproduction sperm

Esophagus liningBladder lining

Tissues are made up of ________ ________ There are four (4) different types of tissue muscle epithelia nervous connective bone loose connective blood cartilage

Epithelial membrane is a covering organ for many organs There are four (4) different types of epithelial membrane we will only discuss two (2) of them Cutaneous membrane (skin) Mucous membrane

Protect us from:  germs and cold  drying out of body’s vital fluid  mechanical injuries of our soft tissues Regulate body’s temperature :  evaporate perspiration  contract or relax the superficial blood vessels Act as organ of sense: it has nerve endings Act as biological gate: it can absorb and eliminate certain substances Has the fastest renewal rate!

covers body cavities that open to the outside epithelia consist of: stratified squamous simple columnar cells is wet because of continuous exposure to secretions not all mucosae secrete mucus (eg. cells that line the urinary tract)