Topic 8: Membranes Flashcards
Why are membranes the simplest organs?
-made of only two tissue types
-epithelium attached to CT
-have a basement
membrane between
them
what are the four membrane types?
-mucous membranes
-serous membranes
-synovial membranes
-cutaneous membranes
what is the purpose of mucous membranes?
-lines cavities that open directly to the exterior of the body
what systems contain mucous membranes?
-digestive
-respiratory
-urinary
-reproductive
-called “the mucosa of the __________________ system”
what is the composition of mucous membranes?
-epithelial layer
-avascular
-varies from simple
squamous to
pseudostratified
-CT layer
-loose areolar
-vascular
what is the CT layer of mucous membranes called?
-lamina propria
what is the purpose of the CT layer in mucous membranes?
-to nourish epithelial cells (diffuses nutrients)
-provides support and connection
what is the purpose of serous membranes?
-lines closed cavities that do not open to the bodies exterior
-ex: abdominal and chest cavities (peritoneal cavity)
-covers organs in these cavities
-called serosa
what type of membranes are serous membranes?
-double membranes
-each has epithelial
layers (often simple
squamous)
-next to the serous
cavity
-also has a CT layer
(areolar)
what are the layers of serous membranes?
-parietal layer
-against the cavity wall
-outer membrane
-visceral layer
-against the organ
-inner membrane
what is between layers in serous membranes?
-serous fluid
-slippery
how are serous membranes named?
-named for location
-ex: pleura = lung
-parietal pleura +
visceral pleura
-ex: peritoneum = abdominal organs
-parietal peritoneum
+ visceral peritoneum
-ex: pericardium = heart
-parietal pericardium
+ visceral pericardium
where are synovial membranes located?
-in joints
what makes synovial membranes different?
-composed of ONE tissue type
-no epithelium
what are synovial membranes composed of?
-areolar CT
