Integumentary System Flashcards
3 layers?
epidermis, dermis, and hypodermis
It is involved in _____, vitamin __ production, and protection from _______.
homeostasis, D, pathogens
Epithelial cells
Simple or stratified
Squamous, cuboidal or columnar
The _______ is the most superficial layer and contains _____
It protects against dehydration, UV radiation, and pathogens
epidermis, keratinocytes
Corneum has what cells
Corneocytes
The stratum layers (most superficial to deep) are: (use acronym)
Come Let’s Get Some Beers
Corneum (corneocytes)
Lucidum (dead keratinocytes)
Granulosum (lamellar bodies)
Spinosum (strength)
Basale (UV radiation)
Lucidum is present where
Dead keratinocytes
Granulosum has
lamellar bodies
Spinosum is important for what
Important for strength (desmosomes) and immunity (Langerhans cells)
Basale
Hemidesmosomes
UV radiation.
Light touch sensation (Merkel cells) & melanin synthesis (melanocytes) occurs here.
2 layers of the dermis
papillary and the reticular dermis
papillary dermis
more superficial and thin, high surface area
the reticular dermis
deeper and thick, made of dense irregular connective tissue
What is hair made up of?
Made of keratin, generated from hair follicles, stands up via erector pili muscles, and offers sun and hypothermia protection.
Only mammals have true hair.
Sudoriferous glands consist of:
Eccrine glands and Apocrine glands
Apocrine glands
are located at specific sites and secrete into a hair follicle. They produce earwax (ceruminous) or milk (mammary), depending on their location.
Eccrine glands
(sweat glands) are
located on the entire body surface and are important in thermoregulation.
The hypodermis (subcutaneous layer) is the _____ layer
deepest
What is the hypodermis made up of? Main function?
Larger nerves and blood vessels
Made of loose connective tissue and adipose (fat) tissue
Main function is fat storage
