Chapter 3: Integumentary System: Skin, Etc. Flashcards
Antimicrobial barrier often possessing viscous, moist secretions on its surface and covering most body surfaces not directly in contact with the outside environment.
Mucous membrane
Fibrous sheet found underlying epithelial and endothelial tissue.
Basement membrane
Skin as defined from the perspective of its being a tissue membrane.
Cutaneous membrane
Most abundant protein in mammals, connects together tissues and is the primary constituent of connective tissue.
Collagen
Connective tissue protein that is capable of fairly substantial stretching and contraction while exerting force towards return to its original size.
Elastin
Crosslinked collagen fibers that create a fine mesh that serves as connective tissue internal support of various soft internal tissues within animal bodies.
Reticulin
Major protein constituent of the outer layer of skin, nails, hair, reptilian scales, feathers, hooves, claws, beaks, baleen, horns including those of rhinoceros, and porcupine quills.
Keratin
Body barrier as displayed by vertebrate animals to microorganisms and various invertebrate animals as well as water, nutrients, and colloidal substances as found in bodies.
Skin
The underlying layer of the skin.
Hypodermis
Alternative name for hypodermis.
Subcutaneous
The middle layer of the skin.
Dermis
The outer layer of the skin.
Epidermis
The lower-most layer of the epidermis.
Basal stratum
The upper-most layer of the epidermis.
Cornified stratum
Cells that are responsible for generating the primary protein constituent of the cornified layer of skin as well as of various skin appendages such as hair.
Keratinocytes
Cells responsible for producing the major pigment associated with skin and hair.
Melanocytes
Common pigment associated for example with skin, hair, and eyes which serves as an absorbent of ultraviolet radiation.
Melanin
Single layer of tightly connected animal cells that serves as a surface covering of other tissues.
Simple epithelium
Multiple layers of tightly connected animal cells that serve as a surface covering of other tissues.
Stratified epithelium
Smooth muscles attached to hair follicles.
Arrector pili
Keratin-based skin appendage that is a defining characteristic of mammals.
Hair
Source in mammals of defining keratinized skin appendages as well as the outlet for apocrine and sebaceous glands.
Hair follicle
Hardened keratin-based structures found at the terminus of most primate digits.
Nails
Means by animals generate substances that are then released via ducts.
Exocrine gland
Antimicrobial as well as cooling fluid released onto the skin by certain exocrine glands.
Sweat
Releaser, onto the skin, of sweat.
Eccrine gland
Releasers of non-sebum oily materials into hair follicles and from there to the surface of our bodies.
Apocrine gland
Releasers of water-proofing materials into hair follicles and from there to the surface of our bodies.
Sebaceous gland
Lubricating, waterproofing, and antimicrobial substance secreted onto the skin of mammals.
Sebum
Acne vulgaris
Skin condition associated with blockage of hair follicles and sebaceous glands.
Boil
Deep hair follicle infection.
Impetigo
Contagious bacterial skin infection common especially among young children.
Wart
Growth-like viral infection of the skin.
Hardened as well as thickened regions of epidermis that develop in skin given substantial use.
Callus
