Integumentary System Flashcards
It covers the body and is the major external barrier between the outside world and the body.
skin
It represents the interface between the internal body and the external environment.
Skin
It has important protective functions and is constantly renewing itself.
Skin
The primary role of the skin
protection (this includes protection from physical injury, including UV light, and providing a barrier to pathogens)
It is crucial to an animal’s thermoregulation, sensing of its environment, and energy and metabolic functions.
skin
Skin is crucial to?
*to an animal’s thermoregulation
*sensing of its environment
*energy and metabolic functions
It also provides environmental protection, producing pigment and vitamin D, and sensory perception.
skin
The skin also provides what?
*environmental protection
*producing pigment and vitamin D
*sensory perception
It is the body’s largest organ and may represent 12%–24% of an animal’s body weight depending on the species and age.
Skin
Skin may represent how many percent of an animal’s body weight depending on the species and age?
12%–24%
skin consists of the following structures: (5)
*epidermis
*basement membrane zone
*dermis
*appendageal system
*subcutaneous muscles and fat
a genetic disorder that affects the skin, in which there is no melanin production
Albinism
It is a secretion involves exocytosis of membrane-bound secretory vesicles.
Apocrine
This is the major secretion form of epitrichial glands (often referred to as just “apocrine glands”) and eccrine glands.
Apocrine
Apocrine is the major secretion form of what glands?
apocrine glands and eccrine glands
a type of stem cell found in the stratum basale and in the hair matrix that continually undergoes cell division, producing the keratinocytes of the epidermis
Basal cell
extension of the papillary layer of the dermis that increases surface contact between the epidermis and dermis
Dermal papilla (plural = dermal papillae)
the dermis layer of skin between the epidermis and hypodermis, composed mainly of
what?
connective tissue containing blood vessels, hair follicles, and sweat glands
a structure that forms an impermeable junction between cells
elastin fibers made of the protein elastin that increase the elasticity of the dermis
Desmosome
A secretion involves the rupture of the secretory cell, thereby releasing the cytoplasmic contents.
Holocrine
This is the major secretion form of sebaceous glands.
Holocrine
It is a fibers made of the protein elastin that increase the elasticity of the dermis
Elastin fibers
It is a clear protein-bound lipid found in the stratum lucidum that is derived from keratohyalin and helps to prevent water loss epidermis outermost tissue layer of the skin
Eleidin
Eleidin is derived from?
keratohyalin