Integumentary system Flashcards
What is the most superficial layer
epidermis
why is the epidermis made of dead cells
What are the four type of cells that make up the epidermis?
Melanocytes
keratincytes
langerhans’s
merkel
melanocytes
pigment cells that produce melanin - more melanin = darker skin
keratincytes
makes up most of the epidermis, produces protein keratin - makes the skin waterproof + tough
Langerhan’s
immune cells to kill off pathogens
Merkel
sense of touch
What is the dermis
strong inner layer under the epidermis, it’s elastic + pink
What is in the dermis?
blood vessels, nerves, sweat glands, sebaceous glands, hair roots
What is the subcutaneous layer?
made up of fatty tissues
stores energy
adipose tissue helps to insulate the body by trapping heat produced by the muscles
What do the sebaceous glands do
secrete sebum
lubricate for hair
provides waterproofing and elasticity
what are the two types of sebaceous glands?
eccrine - help regulate body temperature (evaporative cooling)
Apocine - found in armpit and pubic areas, inactive until puberty - body odour
What are the purpose of nails?
protect sensitive fingers + toes, help pick things up, nails are a good indicator of health
Where is hair found?
everywhere except for palms of hands, sole of feet, eyelids, and lips
What is the purpose of hair + what is it made out of
keeps u warm and stops UV light from hitting
made of dead keratincytes
