Epithelial

Epithelial

1. Membranes

   • Simple
     • Simple Squamous
       • airsacs/lungs
         • rapid diffusion/secretes lubricating serous fluid
     • Simple Cuboildal
       • liver, thyroid, mammary, slaivary, kidney tubules
         • absorption and secretion, mucus production/movement
     • Simple Columnar
       • stomach lining, intestines, gallbladder, uterus, uterine tubes
         • absorption, mucus secretion, movement of egg and embryo
     • Pseudostratified Columnar
       • respiratory tract, portions of male urethra
         • secretes and propels mucus
   • Stratified
     • Stratified Squamous
       • keratinized
         • palms, soles
           • protection, retards water loss through skin
       • nonkeratinized
         • tonge, oral mucosa, esophagus, anal canal, vagina
           • protection
     • Stratified Cuboidal
       • sweat gland ducts, egg-producing vesicles, sperm producing ducts
         • contributes to sweat secretions, secretes ovarian hormones, produces sperm
     • Stratified Columnar
       • pharynx
     • Transitional
       • urinary tract, bladder umbilical cord
         • stretches

2. Glands

   • Exocrine
     • Simple
       • acinar
       • tubular
         • sweat gland
     • Compound
       • acinar
         • mammary
       • tubuloacinar
         • pancreas
   • Endocrine
     • pituitary, thyroid, adrenal