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Terms in this set (18)
They are more than one kind of tissue. They are usually a tough layer of connective tissue overlaid with epithelial or lubricating mucus/serous fluid producing cells. They are thin sheets of tissue that cover the body, line body cavities, and cover organs within the cavities in hollow organs.
Functions of body membranes
1. Boundaries - Cover surfaces
2. Support- Lines body cavities
3. Cushioning- Forms protective sheets around organs
4. Lubrication- Secretion, absorption and lubrication
Two types of body membranes
1. Epithelial membranes
2. Connective tissue membranes
Three types of epithelial membranes
1. Cutaneous membrane
2. Mucous membranes
3. Serous membranes
It is exposed to the external environment. It is a dry membrane where epithelium tissue rests on connective tissue. e.g. The skin is covered with a stratified squamous epithelium, called the epidermis, which manufactures a tough, waterproof protein called keratin.
It lines all body cavities exposed to the external environment. It lines the inside of some hollow organs / "tubes" e.g. Respiratory, digestive urinary and reproductive systems. It is a wet membrane which is covered in mucous secretions.
It is thin layer of simple squamous epithelium resting on connective tissue. It occurs in pair and lines body cavities NOT exposed to the external environment. e.g. Ventral Cavity- Pleural, pericardial & peritoneal.
3 P's of serous membrane
Pleural, pericardial and peritoneal
It is a membranous sac around the lung cavity
It is a membranous sac around the heart
It is a serous membrane lining the interior of the abdominal cavity and covering the surfaces of the abdominal cavity.
Two layers of serous membrane
1. Parietal: lines a specific part of the ventral cavity
2. Visceral: lines the outside of the organ
Both layers secrete serous fluid
Two types of connective tissue membranes
1. Synovial membranes
It is the soft tissue found between the articular capsule(joint capsule) and the joint cavity of synovial joints. The word "synovium" is related to the word "synovia" (synovial fluid), which is the clear, viscous, lubricating fluid secreted by synovial membranes.
Function of synovial membrane
1. It cushions and protects joint surfaces
2. Provides smooth surface for movement
The meninges are three connective tissue membranes that lie just external to the brain and spinal cord.
Three layers of meninges
1. the dura mater
2. the arachnoid mater
3. the pia mater
Function of meninges
The primary function of the meninges and of the cerebrospinal fluid is to protect the central nervous system.
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