Unit 5 INTEGUMENTARY Flashcards
LARGEST ORGAN
SKIN
2 COMPONENTS OF INTEGUMENTARY SYSTEM
Skin
Accessory structures (Hair, Nails, Glands)
FUNCTIONS OF INTEGUMENTARY SYSTEM
Protection Thermoregulation Synthesis and storage of nutrients Sensation Excretion and Secretion
2 MAJOR LAYERS OF SKIN
+
LAYER BELOW THE SKIN
Epidermis - 5 layers
Dermis - 2 layers
Hypodermis
LAYERS OF EPIDERMIS
Stratum Corneum = Huge layer, dead cells, keratin, water resistant
“ “ Lucidum
“ “ Granulosum
“ “ Spinosum
“ “ Basale = Connects to the Dermis, deepest layer, fingerprint, protects from Uv
Layers OF DERMIS
+
STRUCTURES HERE THAT AREN’T IN THE EPIDERMIS
Papillary
Reticular
Blood, Nervous tissue, Glands
THICK & THIN SKIN
Thick = 5 Layers, palms & soles
Thin = 4 Layers, Everywhere else
PSORIASIS
Overgrowth of the very top layer of the Epidermis (Cornium)
PIGMENTS
2
Carotene - (Reddish orange) Protects from Uv
Melanin - (Darker Brown Reddish) Production can be simulated by increased Uv radiation (Tan)
BLUE & RED COLORING
Blue - Cyanosis
Red - Erythema
COMMON SKIN CANCER
&
DEADLIEST
Common - Carcinoma
Deadly - Malignant Melanoma
SWEAT GLANDS
2
Apocrine sweat glands - Armpits, Breast, Genitals
Merocrine sweat glands - Hands, Feet
SEBACEOUS GLAND
ACNE
Holocrine secretion
Secrete oil called Sebum
Blocked glands lead to acne
MODIFIED SWEAT GLANDS
2
Mammary glands - Breast milk - Apocrine secretion
Ceruminous glands - Ear wax - Apocrine secretion
DIAGRAM OF NAIL
Nail body - Big part
Lunula - White half moon
Cuticle - SKin like part
