Flashcards
Integumentary
Cards in this deck (27)
- 1Integumentary systemHelps maintain body temperature and protects internal organs (i.e skin)
- 2Functions Integumentary system:-protects the body: resistance to trauma and infection
-Moisture retention
-Vitamin D synthesis
-Sensation
-Thermoregulation - 3Epidermisthe surface epithelium of the skin of an animal, overlying the dermis
-Keratinized stratified squamous epithelium - 4Cells of epidermis are...-Kerantinocytes
-Melanocytes
-Epidermal dendritic (Langerhans) cells
-Tactile (Merkel) cells - 5Keratinocytesproduce fibrous protein keratin
- 6Melanocytes-10–25% of cells in lower epidermis
-Produce pigment melanin - 7Epidermal dendritic (Langerhans) cells- macrophages that help activate immune system
- 8Tactile (Merkel) cells- touch receptors
- 9Stratum corneum- Most superficial layer; 20–30 layers of dead
- Cells, flat membranous sacs filled with keratin - 10Stratum granulosum3-5 layers of flattened cells, organelles deteriorating
- 11Stratum spinosumSeveral layers of keratinocytes unified by
desmosomes. - 12Stratum basale- Deepest epidermal layer; one row of actively
- mitotic stem cells; some newly formed cells become part of the more superficial layers.
- Occasional melanocytes and epidermal
dendritic cells. - 13—Keratinocytes
- 14DermisThe lower or inner layer of the two main layers of cells that make up the skin.
- 15Characteristics of Dermis- Strong, flexible connective tissue
- helps regulate body temperature, and sebum, an oily substance that helps keep the skin from drying out. - 16What lives in the dermis ?Hair, sweat and oil glands live here
- 17Two layers of dermis:- Papillary
- Reticular - 18What skin layer provides a rich supply of nerve, blood and lymphatic tissue?Dermis
- 19Papillary layer (dermis)Areolar connective tissue with collagen and elastic fibers and blood vessels
- 20Dermal papillae contain:- Capillary loops
- Meissner’s corpuscles
- Free nerve endings - 21Reticular layer- 80% of the thickness of dermis
- Collagen fibers provide strength and resiliency
- Elastic fibers provide stretch-recoil properties - 22Hypodermis (subcutaneous layer)the innermost and thickest layer of the skin
- 23What kind of tissue in hypodermis?Subcutaneous tissue:
-adipose tissue & loose connective tissue - 24Functions of hypodermis- energy reservoir
- thermal insulation & padding for the body - 25Hypodermic injections are __. (highly vascular)subcutaneous
- 26Organs of the Integumentary system are:Derivatives of the epidermis, which includes: -sweat glands, oil glands, hair and hair follicles, nails
- 27—
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- Science Flashcards on Integumentary, created by Mischa Cole on 27/10/2016.
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- Mischa Cole
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