the integumentary system Flashcards
structure of skin
name the two main parts
epidermis
dermis
what is the epidermis
surface epithelial layer
what is the dermis
deeper connective tissue layer
deep dermis not part of the skin
subcutaneous layer or hypodermis
skin consits of two basic tissues
what are they
epithelium and connective
what are the two layers of which skin is arranged into
epidermis (epithelium)
dermis (connective)
what are the four cell types in epidermis
Keratinocytes – major group
Melanocytes
Langerhans cells
Merkel cells
what does keratinocytes
90% of epidermal cells
4-5 layers
Produce keratin
Protect skin
Waterproof skin
what are the three factors that contribute to skin colour
amount of melanin in the epidermis
amount of carotene in stratum corneum and subcutaneous
oxygen in blood
name some abnormalities in skin pigmentation
albinism
melasma
pigment loss after skin damage
vitiligo
birthmarks
what is albinism
inherited recessive disorder
little to no melanin
what is melasma
dark brown symmetric areas on face and neck
what is a haematomas
bruises or black and blue marks on the skin
blood has escaped circulation and has no clotted in tissue spaces
where would you not normally find hair on the body
palmar surfaces of hand and fingers or plantar surfaces of feet
not in thick skin
name some functions of integumentary system
temperature regulation
protection
sensory reception
excretion
absorption
vitamin D synthesis
name the body parts which are included in Integumentary System
skin
nail
hair
the glands and nerves on your skin
