Integumentary System Flashcards
Consists of the skin and its accesory structures
Integumentary System
What makes the integumentary system?
Hair
Nail
Glands
System that covers the outside of the body
Integumentary System
Means covering
Integument
Protects underlying structures against abrasion
Stratified squamous epithelium
Absorbs UV light and protects underlying structures
Melanin
It acts as heat insulator
Hair
Keep sweat out of the eyes
Eyebrow
Protect the eyes from foreign subjects
Eyelashes
An important regulator of calcium homeostasis
Vitamin D
Essentials for bone growth and muscle function
Calcium and phosphate
What is normal body temperature?
37 ° Celsius
Removal of waste products of the body
Excretion
3 types of heat loss
Radiation
Convection
Conduction
Heat is loss through infrared energy
Radiation
Through air movement
Convection
Through direct contact with an object
Conduction
Skin is made up of two tissue layers:
Epidermis
Dermis
Usually referred to as thin skin
Skin
Found only on the palms of the hands and soles of feet
Thick skin
The most superficial layer of the skin
Epidermis
It is made up of stratified squamous epithelium
Epidermis
It prevents water loss and resists abrasions
Epidermis
Distinct layer of epidermis
Strata
What are the five epidermal strata?
Stratum basal
Stratum spinosum
Startum granulosum
Stratum lucidum
Stratum corneum
Deepest layer of epidermal strata or stratum
Stratum basal or Strstum Germinativum
Stratum basale is also called or known as
Stratum germinativum
Germinativum means
Growth
Undergo mitotic division every 19 days
Stratum basale
Spiny appearance composed of 8-10 layers of keratinocytes
Stratum spinosum
Stratum that has grainy appearance; generate large amounts of keratin
Stratum granulosum
A translucent strata/layer
Stratum Lucidum
Can only be found on thick palms, sole and digits
Stratum lucidum
Outermost layer of epidermis
Stratum corneum
Mechanical link that bind cells together
Desmosomes
Excessive loughing of corneum from the surface of the scalp
Dandruff
Thickened area produced when the skin is subjected to friction
Callus
Excessive sloughing of corneum
Dandruff
Results to increased layers of stratum corneum
Callus
a CONE SHAPED STRUCTURE caused by thickening of the stratum corneum
Corn
New cells is pushing old cells to the surface
Keratinization
The second major skin region
Dermis
Composed of dense collagenous connective tissue
Dermis
Supplies nutrients and removes waste products to the overlying epidermis
Dermis
Areas where skin is most resistant to stretching; orientation of collagen fibers
Cleavage line
Visible line through the epidermis that result overstretched skin;
Stretch marks
Usually common when a person increases in size quite rapidly
Stretch marks
Thin connective tissue layer that contains blood vessels
Papillary layer
Finger like projections in the upper part of dermis which extend toward the epidermis
Dermal Papillae
Arranged pattern that form looped ridges in the epidermal surface ; it is the fingerprints and footprints
Dermal Papillae
Identifying films of sweat, formed by the ridges of the fingertip
Fingerprints
Responsible for production of melanin
Melanocytes
The group of pigments responsible for skin, hair, and eye color.
Melanin
Provides protection from the UV lights
Melanin
Responsible for the amount of melanocytes produced in different races
Genetic factors
Genetic trait that causes a deficiency or absense of melanin
Albinism
The skin reacting to UV exposure
Sunburn
Packed melanin
Melanosomes
Attaches skin to the underlying bone and muscle
Hypodermis or subcutaneous tissue
Below the dermis
Hypodermis or subcutaneous tissue
Found everywhere in the skin
Hair
Flexible strands of keratinized cells; above the surface of the skin
Hair shaft
Protudes below the surface
Hair root
Base of hair root; where the hair is produced
Hair bulb
Epidermis that extends deep into the dermis
Hair follicle
A hard covering hair that is surrounded by cuticle
Hair cortex
A soft center that is surrounded by the cortex
Medulla
An extension of the dermis that protrudes into the hair bulb; the blood vessels within the supply the haiir bulb
Har papilla
Two major glands in hair
Sebacious and sweat glands
Simple, branched acinar glands
Sebaceous
Two types of sweaf glands
Eccrine and apocrine
A thin plate with layers of dead stratum corneum with a very hard type of keratin
Nail
The visible part of the nail
Nail body
The covered part by the skin
Nail root
A stratum corneum that extends on the nail body
Cuticle or epynychium
A whitish, crescent shaped area of the base of the naill
Lunula
Caused by increased blood flowing through the skin
Blushing / redness
Decreased blood flowing
Paless or pallor
A bluish color of skin caused by decrease in the blood oxygen
Cyanosis
A yellowish discoloration of the skin
Jaundice
A yellow pigment found in the plants like squash amd carrot
Carotene
A darkened skin pigmentation usually caused by stimulant effecfs of excess ACTH
Bronzing
A blue to purple discoloration caused by broken blood vessels
Bruising
An injury tissue caused by heat, cold, friction, chemicals, electricity, or radiation
Burn