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Three general Membranes!

This resource provides a comprehensive overview of the three main types of membranes in the human body: serous, mucous, and cutaneous membranes. We describe each membrane type and its subtypes, discuss the tissues that compose them, and identify their locations and functions. Serous membranes line the ventral body cavities, mucous membranes line open cavities to the exterior, and cutaneous membranes cover the body’s surface. Understanding these membranes is crucial for grasping how they protect, lubricate, and support bodily functions.

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Three general Membranes!

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  1. Three general Membranes!

  2. 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

  3. 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??

  4. 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

  5. Serous Membrane Functions • Enrich fluid from capillaries with some cell adhesion molecules • Fluid between membrane allows for slight movement

  6. 2 types of serous membranes • Visceral serosa – lines organ • Parietal serosa – lines cavity wall

  7. Heart • Parietal pericardium • Visceral pericardium Serosa Lungs • Parietal Pleura • Visceral Pleura Organs (abdominal pelvic) • Parietal peritoneum • Visceral peritoneum

  8. Mucous Membranes • Lines cavities “open” to exterior • Wet and moist! • Secretes mucous and other products • Don’t forget it is great for absorbtion • Layers: • simple Squamous or columnar • Loose CT • Smooth muscle (maybe)

  9. Cutaneous Membranes • Only “dry” membrane • Skin! • 2 Layers • Keratinized Stratified Squamous Cells! • Dense Irregular CT

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