Human Anatomy Lab 7
Terms
undefined, object
copy deck
- Dermis
- Deeper than the epidermis. It is directly under the top layer of your skin.
- Epidermis
- Located on the surface (It's the part of your skin that shows)
- Hypodermis
- Not a layer of the integument, but it layers the integument to the underlying bone or muscle.
- Sebaceous Glands
- Oil glands
- Sudoriferous Glands
- Sweat glands
- Sweat Ducts
- Connect suderiferous glands to the surface of the skin.
- Stratified Squamos Epithelium
- Epidermis is composed of this, with the superficial layer infused with the protein karatin.
- Keratin
- A tough, water-resistant material that also serves to protect lower layers of the epidermis from ultraviolet radiation.
- Strata
- Layers in the epidermis.
- Stratum Basale
- The deepest layer of the epidermis in thick skin. This single layer of cells is adhered to the dermis by the basement membrane.
- Basement membrane
- A noncellular layer.
- Melanocytes
- Produce melanin.
- Melanin.
- Protects the stratum basale from the damaging effects of ultraviolet radiation.
- Stratum Spinosum
- The layer of numerous cells superficial to the stratum basale.
- Desmosomes
- Cells join at these microscopic junctions.
- Stratum Granulosum
- A layer of granular cells. These cells have purple-staining granules in their cytoplasm.
- Stratum Lucidum
- This is only found on the palms of the hand and the soles of the feet.
- Stratum Corneum
- The most superficial layer of the skin. A tough layer consisting of dead cells flattened at the surface.
- Keratinized Stratified Squamos Epithelium
- The dermis is made out of this.
- Blood Vessles
- Pass into the dermis, bringing nutrients to both the dermis and the epidermis.
- Light Touch Corpuscles
- Sensory is received here, among other places.
- Papillary Layer
- The dermis consists of two major regions- this being the most superficial one.
- Reticular Layer
- The dermis consists of two major regions- this being the deeper one.
- Papillae
- Bumps on the papillary layer that interdigitate with the epidermis, providing good adhesion between the two layers.
- Meissner's Corpuscles
- A light touch corpuscle that is located in the upper portion of the dermis.
- Merkel Discs
- A light touch corpuscle that is located in the upper portion of the dermis and the lower portion of the epidermis.
- Pacinian Corpuscles
- These sense pressure.
- Warm Receptors
- This fires up when you are comfortably warm.
- Cool Receptors
- This fires up when you are comfortably cool.
- Pain Receptors
- These fire up when you go beyond the cold and hot points that are comfortable. These are naked nerve endings that respond to numerous environmental stimuli.
- Lactiferous Glands
- Milk glands
- Ceruminous Glands
- Earwax glands
- Eccrine Glands
- A type of sweat gland that is sensitive to temperature and produces normal body perspiration.
- Evapoative Cooling
- A mechanism using perspiration in order to cool the body.
- Apocrine Glands
- Secrete water and a higher concentration of organic acids than eccrine glands.
- Sebum
- An oily material secreted by sebaceous glands, which lubricates the hair and decreases the wetting action of water on the skin.
- Hair
- An accessory structure of the integumentary system and consists of keratinized cells produced in hair follicles.
- Hair Follicles
- Enclose the hair.
- Shaft
- The part of the hair that erupts from the skin's surface.
- Root
- The part of the hair that is enclosed by the follicle.
- Hair Bulb
- The actively growing portion of the hair.
- Determinate Hair
- Grows to a specific length and stops (groin, eyelashes, brows)
- Indeterminate Hair
- Continues to grow without regard to length.
- Dermal Papilla
- At the center of the bulb, this is a region with blood vessels blood vessels and nerves that reach the hair bulb.
- Root Sheath
- Composed of an outer dermal layer of connective tissue and an inner epithelial layer.
- Arrector Pili
- When these contract, your hair "stands on end".
- Medulla
- The central portion of the hair, enclosed by the outer cortex.
- Cortex
- Encloses the medulla. This may contain a number of pigments, which give the hair its color.
- Cuticle
- This is the layer superficial to the cortex and looks rough in microscopic sections.
- Nail Body
- The big, fatty, flesh-colored part of your nail.
- Free Edge
- The part of the nail you clip (white)
- Eponychium
- The cuticle of the nail.
- Nail Root
- Underneath the eponychium and is the area that generates the nail body.
- Nail Bed
- The layer deep to the nail body.
- Lunula
- The small white crescent that occurs at the base of the nail.
- Hyponychium
- The region under the free edge of the nail.
- Nail Groove
- A depression between the body of the nail and the skin of the fingers.
- Nail Fold
- The ridge above the nail groove.