Integumentary System Flashcards
Functions of skin
Sensation
Flexibility
Excretion
Immunity
Body temp homeostasis
Identify the components of the integumentary system
Hair
Skin
Glands - sebaceous, eccrine, apocrine + ceruminous
Describe the layers of the skin and the functions of each layer
Epidermis -
corneum - dead skin cells w/ keratin
lucidum - contains cells filled w/ keratin precursor, eldin
granulosm - cells arranged in 2-4 layers filled w/ Keratohyalin granules
spinosum - cells arranged in 8-10 layers w/ Desmosomes fuling them into spiny shapes
basale - base layer comprised of single row of columnar cells
Dermis -
Papillary - contains fibroblasts, adipocytes & blood vessels
reticular - well vascularized, rich sensory + sympathetic nerve supply
Hypodermis (subcutaneous layer / Superficial Fascia)
Cells of the skin
Keratinocytes - make + store keratin - not in stratum Bassale
Melanocytes - produces pigment called melanin
Epidermal Dendritic cells - Immune cell
Merkel Cells - touch (sensory) cell
Describe the structure and function of hair and nails
Label diagram of skin
nails
Nail Body
Root
Lunula
Describe the four types of glands in the skin
Sebaceous - attached to hair follicle - scretes sebum
Apocrine - secretes sweat in armpits
Ceruminous - ear - ear wax
Eccrine - found everywhere - secretes sweat
Describe how skin regulates the body temperature
(4 steps)
- Temperature receptors
- Hypothalamus
- Sweat glands secrete
- Temp decreases
Describe the changes to skin during the life span
Children - Elasticity
few sweat glands + rapid healing
Adults - activiation of sebaceous + sweat glands - increase sebum production
Ageing - decrease sebaceous + sweat gland activity - decline in bodies ability to cool itself
Briefly describe burns and melanoma
Burns - death of skin cell lead to mass fluid loss
dehydration, electrolyte imbalance renal + circulatory failure
Melanoma - cancer described as uncontrolled growth of melanocytes
