Integumentary System Flashcards
Integumentary refers to
SKIN
Functions of Integumentary system
Protection Synthesis Sensation Homeostasis Thermoregulation Excretion
BQ. Largest organ in the body
Skin
BQ. Largest internal organ of the body
Liver
Skin is capable of having Thermoregulation due to?
Arterovenous anastomoses
Main function of Vit. D
Calcium absorption
Define Homeostasis
Balance of the internal and external environment of the body
Major layers of the Skin
Epidermis
Dermis
Other name for epidermis
epithelial tissue
Epithelial lining of the skin
keratinized stratified squamous
T/F: Epidermis has no blood supply
false
T/F: Epidermis has blood vessels
False
receptor present in Epidermis
Free nerve endings
Layers of Epidermis (innermost to outermost)
BASALE SPINOSUM GRANULOSUM LUCIDUM CORNEUM
Layer of epidermis with the highest mitotic activity
Basale
What proteins are present in Basale?
Keratin
Melanin
Other name for Basale
Germinativum
Other name for Spinosum
Spinous cell layer
layer of epidermis that contains lipids and hydrolytic enzymes
Spinosum
granules present in Granulosum
keratohyaline
protein present in Lucidum
Eledin
Layer present only in Palm and Soles
Lucidum
outermost layer that contains SQUAMES
Corneum
2 layers with mitotic activity
Basale and Spinosum
This layer contains the stratum Basale and Spinosum
Malphigian layer
Thickest stratum in THICK skin
Lucidum
Thickest stratum in THIN skin
Corneum
SUQAMES produces?
dead skin
Main cell of epidermis
Keratinocytes
Melanocyte is mainly found in what stratum?
BASALE
responsible for pigmentation of skin
Eumelanin
The only immunity cell of the skin
Langerhan cells
Langerhan cells is mainly found in what stratum?
Spinosum
Langerhan is produced where?
Bone marrow
the mechanoreceptor of the skin
Merkel cells
Thin, fibrous, extracellular matrix of tissues that separated the lining of epidermis and dermis
Basement membrane
Basement membrane is found beneath what stratum?
Basale
other names for dermis
Lamina propia
Connective tissue
protein abundant in Dermis
collagen
Most abundant protein in the body
Collagen
Layers of Dermis
Papillary
Reticular
moderaty dense irregular CT with THIN collagenous bundle
Papillary
dense connective tissue with THICK collagenous bundle
Reticular
Layer of dermis responsible for THUMBMARK
Papillary
the attachment of epidermis and dermis is via?
Hemidesmosome
attachment of papillary and reticular layers is via?
Desmosome
Difference bet. Hemidesmosome and Desmosome
Hemidesmosome- attachment of 2 diff. type of cell
Desomosome- attachment of same type of cells
The junction of epidermis and dermis layer is called?
Rete pegs
BQ. Shape of rete pegs
Scalloped/ wave
Glands of Dermis
Sebaceous
Eccrine
Apocrine
Gland that produces sebum (fats)
Sebaceous
Location of Sebaceous gland in the body
Entire body except Palm and Sole
Gland involve in regulating body temperature
Eccrine gland
Location of Eccrine gland
Entire body except lips and external genitalia
Excretion of fluid with destruction of the cells
Holocrine type
Type of excretion in Eccrine gland
Merocrine type
Type of gland secretion in which the top of the cell is lost during secretion
Apocrine type
Gland ass. with hair follicle and triggered when there is emotional stress
Appocrine
Location of Apocrine in the body
Axilla
Mons pubis
areola
peri anal region
Musle found at the base of hair follicle
Arrector Pili Muscle
compensation of the body to cold temperature
contraction of arrector pili muscle by causing the hair follicle to stand up straight for it to generate heat
BQ. Muscle responsible for goosebumps
Arrector pili muscle
What are the sensory nerve ending?
Free nerve endings Pacinian corpuscles Meissner corpuscles Ruffini End bulb of Krause
Sensory nerve endings for heat? cold? pain? heavy touch pain? light touch pain?
Ruffini End bulb of Krause Pacinian Meissner Free nerve endings
otherwise known as subcutaneous
Hypodermis
Fats in hypodermis is responsible for?
Insulation
What are the accessory integumentary of the body?
Nailbeds
hair follicle
Most abundant protein in the skin
Keratin