some of skin aging is due to _________________ factors
intrinsic
the ________________is primarily dense irregular connective tissue
dermis
some of skin aging is due to _________________or _______________________ factros
extrinsic or evironmental
________________provide the skin with sensation
nerves
the integumentary system is composed of the following: _________________, connective tissue structures, ________________, ________________, nails, _______________
blood vessels, glands, hair, skin
skin is composed of three distinct layers: _________________, ___________________, ______________________
epidermis, dermis, subcutaneous layer or hypodermis
three types of fibers are found in the dermis: _____________________, ___________________, ___________________
collagen, elastin, reticulin
the upper layers of the skin fill with ________________ and die
keratin
____________________is composed of cylinders of kerinized cells
