What are the two major categories of body membranes?
Epithelial membranes
Connective tissue membranes
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Give examples of epithelial membranes.
The cutaneous membrane (skin)
The mucous membranes
The serous membranes
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What is the cutaneous membrane composed of?
Two layers - the superficial epidermis and the underlying dermis .
The epidermis is composed of stratified squamous epithelium, and the dermis is mostly dense (fibrous) connective tissue.
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What is the mucous membrane composed of?
Epithelium resting on a loose connective tissue membrane called a lamina propria.
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What is the serous membrane composed of?
A layer of simple squamous epithelium resting on a thin layer of areolar connective tissue.
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Give an example of a connective tissue membrane
Synovial membranes
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What are synovial membranes composed of?
Loose areolar connective tissue and contain no epithelial cells at all.
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What does the Integumentary System
consist of?
The skin and its appendages (sweat and oil glands, hair, and nails).
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What are the functions of the Integumentary System?
Protection
Regulation
Synthetisation
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What two kinds of tissue is the skin composed of?
Epidermis (outer)
Dermis (underlying)
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List the layers of the epidermis (from inside to out)
Stratum Basale
Spinosum
Granulosum
Lucidum
Corneum
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What are the two regions of the dermis?
The papillary layer
The reticular layer
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What is the papillary layer?
This is the superficial dermal region.
It is uneven and has peglike projections from its superior surface, called dermal papillae, which indent the epidermis above (e.g. making fingerprints).
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What is the reticular layer?
The deepest skin layer.
It contains dense irregular connective tissue, as well as blood vessels, sweat and oil glands, and deep pressure receptors (lamellar corpuscles).
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What are the three pigments that contribute to skin colour?
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