BIOL 2130 Lecture Notes - Lecture 15: Stratum Corneum, Stratum Basale, Stratum Spinosum

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29 Mar 2017
Chapter 4
Skin and Body Membranes
Cutaneous Membrane
Cutaneous Membrane= skin
oDry membrane
oOutermost protective boundary
Superficial epidermis is composed of keratinized stratified squamous epithelium
Underlying dermis is mostly dense (fibrous) connective tissue
Mucous Membrane
Surface epithelium type depends on site
oStratified squamous epithelium (mouth, esophagus)
oSimple columnar epithelium (rest of digestive tract)
Underlying loose connective tissue (lamina propria)
Lines all body cavities that open to the exterior body surface
Moist membranes adapted for absorption or secretion
Serous Membranes (Serosa)
Surface is a layer of simple squamous epithelium
Underlying layer is a thin layer of areolar connective tissue
Lines open body cavities that are closed to the exterior of the body
Serous membranes occur in pairs separated by serous fluid
oVisceral layer covers the outside of the organ
oParietal layer lines a portion of the wall of ventral body cavity
Specific serous membranes
Abdominal cavity
Around the lungs
Around the heart
Connective Tissue Membrane
Synovial membrane
oConnective tissue only
oLines fibrous capsules surrounding joints
Lines bursae
Lines tendon sheaths
oSecretes a lubricating fluid
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