Epithelial Membranes

Question 1

membranes

Answer 1

flat sheets of tissue that cover or line a part of the body

Question 2

epithelial membrane

Answer 2

consists of an epithelial tissue bound to an underlying connective tissue layer. (the epithelial tissue and connective tissue together compose the epithelial membrane)

Question 3

3 types of epithelial membranes

Answer 3

1) Cutaneous (dry) membranes
2) Mucous (wet) membranes
3) Serous (wet) membranes

Question 4

Cutaneous membrane

Answer 4

epithelial membrane
-aka SKIN, dry, covers external surface of body

consists of:

• epidermis (keratinized stratified squamous epithelium) (ectoderm)
• dermis [loose (areolar) connective tissue and dense irregular connective tissue] (mesoderm)

Question 5

Mucous membranes

Answer 5

=mucosa
wet membrane

lines a body cavity that opens directly to the exterior; find lining all of the digestive, respiratory, and reproductive tracts, as well as much of the urinary tract

consist of lining epithelium and an underlying layer of connective tissue called the lamina propria

• this underlying connective tissue is loose (areolar) connective tissue
• often there are goblet cells and other types of epithelial cells that secrete mucous to prevent cavities from drying out (remains wet)

Question 6

Serous Membranes

Answer 6

also called serosa
wet membrane

lines body cavities that do NOT open directly to the exterior and the organs that lie within that cavity (specifically ventral)

-consists of MESOthelium (simple squamous epithelium) with underlying loose (areolar) connective tissue.

Question 7

Organs within the ventral body cavity (these organs called viscera) and the walls of the cavity are covered with a ____ membrane.

Answer 7

serous
(epithelial membrane: mesothelium (simple squamous) and loose connective tissue)

1) parietal layer – lines the walls of the cavity
2) visceral layer – adheres to the surface of the organ

come from parts of lateral embryonic mesoderm

Question 8

parietal pericardium vs. visceral pericardium

Answer 8

lining the pericardial cavity and the heart’s external surface, respectively.

Question 9

serous fluid

Answer 9

thin layer located between the parietal and visceral layers to reduce friction when the viscera move.