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Name the different types of membranes & their locations in the body.
LT9
State names & locations of the ventral cavities’ serous membranes.
LT10
MEMBRANES
Types of membranes
 Mucous
 Serous
 Synovial
 Meninges
 Cutaneous
Mucous membranes - location
 Line interior walls of organs & tubes that
open to the outside of the body
 Digestive tract
 Respiratory tract
 Urinary tract
 Reproductive system
 Epithelium overlying connective tissue layer
 Containing goblet cells that secrete mucus
Mucous membranes - function
 Protects interior from invasion (bacteria,
viruses)
 Infection causes increased mucus (runny nose
from a cold)
 Protects walls of stomach & intestine from
stomach acid / without it ulcers form
Serous membranes
 Line the ventral body cavities: thoracic &
abdominopelvic
 Parietal
 Visceral
 Simple squamous epithelium overlying
connective tissue
 Secretes a watery fluid to keep membranes
lubricated
 Compartmentalizes large thoracic /
abdominopelvic & hinders spread of infection
Synovial membranes
 Line joint cavities
 Composed of connective tissue
 Secretes synovial fluid into joint cavity to
lubricate the ends of the bones
 Rheumatoid arthritis = inflammation of
synovial membrane causing it to grow
thicker. Fibrous tissue invades the joint & can
become bony restricting movement.
Meninges
 Dorsal cavity membranes
 Composed of connective tissue
 Serve as protective coating for the brain &
spinal cord
 Meningitis = serious infection of the
meninges
Cutaneous membranes
 Skin! = out covering of body
 Thin outer layer of stratified squamous
epithelium attached to a thicker underlying
layer of connective tissue
 Protection against environmental pathogens
& abrasion
Names & locations of the ventral
cavities’ serous membranes. LT 10
 Thorax = pleural & pericardial
 Lining of thoracic cavity & double back to cover lungs
 Pleurisy = infection of this membrane
 Pericardium = sack enclosing heart
 Pericarditis = infection of this membrane
 Abdomen = peritoneum & mesentery
 Mesentery = parietal & visceral come together to
support visceral organs
 Greater omentum – double layered & covers intestines
 Lesser omentum – runs between stomach & liver
 Peritonitis – inflammation of peritoneum (happens
with appendicitis)