integumentary system (ch 5) Flashcards
what are different names for skin?
the integument, dermal layer, or cutaneous membrane
what does the integument consist of?
epidermis (a true epithelium) and dermis
what kind of epithelium is the epidermis made of?
stratified squamous
what kind of tissue is the dermis made of?
dense irregular connective tissue
what lies below the dermis?
hypodermis (which is made of areolar and adipose tissues; considered a superficial fascia)
name the five nerve receptors that detect certain feelings
Merkel’s, Meissner’s, Ruffini’s and Pacinian corpuscles,
along with free nerve endings
What sensations do Merkel’s corpuscles detect?
fine touch or pressure (ie texture or shape); in EPITHELIUM
What sensations do free nerve endings detect?
pain (free nerve endings are in dermis and base of epidermis)
what sensations do Meissner’s corpuscles detect?
fine touch (dermis)
what sensations do Ruffini corpuscles detect?
warmth (dermis)
What do Pacinian corpuscles detect?
deep pressure (dermis)
Name the five nerve endings in order, starting from the epidermis and going deeper
Merkel, free, Meissner, Ruffini, Pacinian
“My Friend Made Rice Pudding
Name the two skin types
thin skin and thick skin
What is the difference between the two skin types?
thin skin has sebaceous (oil), hair, and sweat glands, while thick skin only has sweat glands
name the layers of the epidermis in order from superficial to deep
Corneum, Lucidum, Granulosum, Spinosum, Basale
“Come, Let’s Get Sun Burned”
true or false: cells of lucidum and corneum have no nucleus and are dead
true
where do hypodermal injections occur?
hypodermis
what are the three major exocrine glands of the skin?
merocrine (aka eccrine), apocrine, holocrine (aka sebaceous)
the gut tube is derived from the ___
endoderm
epidermis and nerves are derived from ____ in embryos
ectoderm
dermis and blood vessels are derived from ____ in embryos
mesoderm
what are the secretion types?
sweat, sebaceous (oil), mammary (milk), ceruminous (wax)
list four types of epidermal derivatives
hair, nails, sweat and sebaceous glands
where are melanocytes found, and what is their function?
found in bottom layer of epidermis; produce melanin
