CH 10 Integumentary System (part 2) Flashcards
1
Q
Stratum Lucidum
A
- layer immediately superficial to the stratum granulosum
- clear due to the accumulation of keratin fibers in cell cytoplasm
- not present in all species, but found in areas of high wear and tear like the foot pads
2
Q
Stratum Granulosum
A
- layer immediately superficial to the stratum spinosum
- cells contain keratin granules in their cytoplasm
3
Q
Stratum Spinosum
A
- layer immediately superficial to the stratum basale
- thickest in hairless regions and areas of high wear and tear
- keratinization and desquamation begin here
- aka prickle or spinous layer
4
Q
Keratinization
A
the development of the hard, protein constituent of hair, nails, epidermis, horny structures, and tooth enamel
5
Q
Desquamation
A
the process in which cell organelles gradually dissolve
6
Q
Stratum Basale
A
- aka stratum germinativum
- deepest or basal layer that continually multiply to replenish cells lost from the epidermal surface
7
Q
Cubodial
A
cube-like cells arranged in rows
8
Q
Dermis
A
layer directly deep to the epidermis
- aka the corium
- composed of blood and lymph vessels, nerve fibers, and accessory organs of the skin
9
Q
The dermis contains connective tissue which is composed of
A
- fibroblasts
- collagen
- histiocytes
- mast cells
- perception
10
Q
Fibroblasts
A
fiber - productin cells
11
Q
Collagen
A
- major fiber in the dermis
- tough, flexible, fibrous protein found in the skin, bone cartilage, tendons, and ligaments
- Kolla (glue) + -gen (to produce)
12
Q
Histiocytes
A
- phagocytic cells that engulf foreign substances
- aka tissue macrophages
13
Q
Mast cells
A
cells that respond to insult by producing and releasing histamine and heparin
14
Q
Histamine
A
chemical released in reponse to allergens that causes itching
15
Q
Heparin
A
Anticoagulant chemical released in response to injury
