Integumentary System Flashcards
Components of the integument
Skin, nails, hair, sweat glands, sebaceous glands
functions of the integument
Protection, prevent water loss, temp regulation, metabolic regulation, immune defense, sensory receptors, excretion by secretion
3 layers of skin
Epidermis, dermis, hypodermis
What is not a part of the integument?
hypodermis
What is the dermis and hypodermis made of?
connective tissue
What is the epidermis made of?
epithelial tissue
5 layers of epidermis
Stratum corneum, lucidum, granulosum, spinosum, basale
Which layer of the epidermis is only present in thick areas of skin?
Stratum lucidum
Keratinocytes
cell type of the epidermis
a hard protein that will protect our skin
Epidermal dendritic cells
macrophages
Tactile cells/Merkel cells
sensory cells
Melanocytes
cells that produce melanin that give us color and will protect us from UV rays
3 major proteins determining skin color
hemoglobin, melanin, carotene
Hemangioma
benign tumor of blood vessels
Vitiligo
depigmentation, melanocytes fail to make melanin or die
Albinismm
congenital
lack of pigment
danger of sunburn or skin cancer
Fingerprints
epidermal ridges
Layers of the Dermis
papillary
reticullar
vascular and innervated
Arrector pili muscle
causes our hair to stand up straight when we are cold or scared = goosebumps
Cleavage lines
orientation of collagen bundles, where a parallel incision will not cause a scar
Hypodermis is also known as
subcutaneous fat
parts of nails
free edge
lumula
cuticle
nail matrix
3 types of hair
lanugo (fetal)
vellus (fine hair, all over body)
terminal (head, pubic region, armpit, facial hair)
Structure of hair
follicle, root, shaft
contains keratin
arrector pili muscle
