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Mucous & Serous Membranes

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Madison De La Garza

on 6 February 2014

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Transcript of Mucous & Serous Membranes

Mucous & Serous Membranes
What are the layers of the Mucous Membrane?
Consist of two to three layers:
• An epithelium
• An areolar connective tissue called the lamina propria
• Sometimes a layer of smooth muscle called the muscularis mucosae

What is a mucous membrane?
It is a membrane lining bodily cavities and canals that lead to the outside, chiefly the respiratory, digestive, and urogenital tracts. Mucous membrane lines many tracts and structures of the body, including the mouth, nose, eyelids, windpipe and lungs, stomach and intestines, and the ureters, urethra, and urinary bladder. It varies in structures, but they all have a surface layer of epithelial cells over a deeper layer of connective tissue

Alejandra Alejandro
Gabriela Avila
Natali Cruz
Madison De La Garza

What are the functions of the
mucous membrane?
• Has Absorptive, secretory, and protective functions
• They are covered with mucus secreted by goblet cells, multicellular mucous or both.

What is serous membrane?
What is serous membrane?
A serous membrane or 'Serosa' is a smooth membrane consisting of a thin layer of cells which secrete serous fluid. It lines and encloses several body cavities, known as serous cavities where they secrete lubricating fluid which reduces friction from muscle movement.
Where is the Serous membrane?
Serious membranes are located in the body cavities that are not open to exterior.
Serious membranes are found around joints like synovial membranes that lines the fibrous capsules in joints such as ligaments.
They are located around organs like thoracic and abdominal.
They are kept moist at all times.
They are meant to protect
Differences: Mucous
1) Location -- Mucous membranes line cavities that connect with the exterior, including the digestive, respiratory, reproductive, and urinary tracts.
2) Function -- Mucous membranes protect the tracts from mechanical factor, chemical substances, and microorganism invasion.
3) Types -- Mucous membranes: simple epithelia, stratified squamous epithelium, the transitional epithelium
Differences: Serous
1) Location--Serous membranes line the sealed, internal cavities of the body.
- There are three such membranes with each consisting of a simple epithelium supported by loose connective tissue:
- The pleura lines the pleural cavities and covers the lungs
- The peritoneum lines the peritoneal cavity and covers the surfaces of enclosed organs such as the liver and stomach
-The pericardium lines the pericardial cavity and covers the heart.
2) Function--Serous fluid covers the surfaces to minimize friction between opposing surfaces.
3) Types--Serous membranes: there are parietal and visceral portions. Parietal lines the outer wall of the internal chamber. The visceral portion covers organs within the body cavity.

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