Integumentary System Flashcards
label the skin
grade yourself accordingly
contains sensory organs that detect arriving stimuli from the external environment
integumentary system
the integumentary system makes up what percent of the body weight
15-20 percent
largest organ of the body
integumentary system
Functions of the integumentary system (5)
barrier
homeostatic
sensory
secretory
excretory
agents that the skin can act against as
physical
chemical
biological
prevents water loss and regulates body temperature
what function of the skin
homeostatic
can sense touch, pain, and pleasure sensitivity
what function of the skin
sensory
converts precursor molecules to vitamin D, lubricants for hair pheromones
what function of the skin
secretory
Two layers of the integumentary system
epidermis
dermis
surface layer of the skin
epidermis
its invagination forms skin glands, both exocrine and endocrine glands
epidermis
Interaction of dermis and epidermis forms specialized structures such as (4)
teeth
feathers
hair
scales
outermost layer of the frog skin, differentiated into two
epidermis
two layers of epidermis in frog skin
stratum germinativum
stratum corneum
innermost layer of the epidermis
stratum germinativum
outermost layer of the epidermis
stratum corneum
deep layer of the frog skin
dermis
layer of dermis in frogs
stratum spongiosum
stratum compactum
subcutaneous layer
lies immediately below the stratum
germinativum
stratum spongiosum
specialized structures associated with stratum spongiosum (3)
melanophores
mucous glands
poison glands
lines the stratum spongiosum, a specific type of chromatophore (
melanophore
pigment cell
chromatophore
produces a brown or black pigment
melanophore
secretes a slimy secretion
mucous glands
part of the mucous gland open onto the surface
mouth
part of the mucous gland is a duct leading to the mouth from the body or fundus
neck
secrete toxic substances, only present in poisonous amphibians
poison glands
thickest layer in frogs skin, made up of connective tissue fibers which are arranged horizontally
stratum compactum
the deep extension of the dermis, usually containing adipose tissue
subcutaneous layer
label the frog’s skin
grade yourself accordingly
the outermost layer of the skin, differentiated into 5 layers
epidermis
innermost layer, where cells are produced continually and migrate towards the surface
stratum basale/germinativum
skin layer where mitosis occurs
stratum basale/germinativum
immediately superficial to stratum basale
stratum spinosum
a granular layer peripheral to the stratum spinosum
stratum granulosum
third layer, lies just above the stratum granulosum, this layer occurs only in thick skin, also immediately deep to the stratum corneum
stratum lucidum
outer layer of cells with cornified cytoplasm
stratum corneum
gland that arise from the walls of the hair follicle
sebaceous glands
gland that has coiled tube, numerously distributed within the dermal layer
sweat glands/sudoriferous glands
tiny dandles of smooth muscle associated with hair follicles
arrector pili muscle
exposed part of the hair
hair shaft
the pit in the skin from which each hair springs
hair follicle
– situated at the bottom of the hair follicle
hair bulb/papilla
innermost layer, thickest layer of the skin, differentiated into 3 layers:
dermis
3 layers of dermis
papillary layer
reticular layer
subcutaneous layer
contains many small finger-like projections called papillae, marking the upper region of the dermis projecting into the epidermis
papillary layer
finger-like projections
papillae
region below the papillary layer
reticular layer
the deep extension of the dermis, usually including adipose tissue
subcutaneous layer
label the epidermal derivatives
grade yourself accordingly
label the layers of the skin
grade yourself accordingly
organelles that gives off melanin
melanosomes
layers of the skin
corneum
lucidum
granulosum
spinosum
basale