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Three general Membranes!. Our goals. Describe the 3 membrane types And subtypes Know what tissue each is made of Determine where each would be found Describe each of their general functions. Membranes. They cover and line parts of the body - PowerPoint PPT Presentation
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Three general Membranes!
Our goals
• Describe the 3 membrane types– And subtypes
• Know what tissue each is made of• Determine where each would be found• Describe each of their general functions
Membranes • They cover and line parts of the body• Made of more than one layer of at least 2 type
tissue • What is made of more than one tissue??
Serous Membranes
• Line organs and walls in ventral cavities (what cavities reside there?)
• Moist!• Make sliding along each
other possible!
2 layers• 1.) simple
squamous epithelium
• 2.) thin Areolar CT
Serous Membrane Functions
• Enrich fluid from capillaries with some cell adhesion molecules
• Fluid between membrane allows for slight movement
2 types of serous membranes
• Visceral serosa – lines organ• Parietal serosa – lines cavity wall
Serosa
Lungs• Parietal Pleura• Visceral Pleura
Organs (abdominal pelvic)
• Parietal peritoneum• Visceral peritoneum
Heart• Parietal
pericardium• Visceral
pericardium
Mucous Membranes
• Lines cavities “open” to exterior• Wet and moist! • Secretes mucous and other products • Don’t forget it is great for absorbtion• Layers:1. simple Squamous or columnar2. Loose CT 3. Smooth muscle (maybe)
Cutaneous Membranes
• Only “dry” membrane • Skin! • 2 Layers
»Keratinized Stratified Squamous Cells!»Dense Irregular CT