INTEGUMENTARY SYSTEM
Cards (62)
- consist of the skin and accessory structures, such as hair, glands, and nails
- 5 General Functions of the Integumentary System
- the skin is made up of two major tissue layers, what are those?
- stratified squamous epithelium
- superficial part of the skin
- composed of four or five strata
- prevents water loss and the entry of chemicals and microorganisms
- protects against abrasion and harmful effects of ultraviolet light
- produces vitamin D
- gives rise to hair, nails , and glands
- 5 Strata of Epidermis
- most superficial stratum of the epidermis
- 25 or more layers of dead squamous cells
- provides structural strength due to keratin within cells
- prevents water loss due to lipids surrounding cells
- sloughing off of most superficial cells resists abrasion
- 3 - 5 layers of dead cells
- appears transparent
- present in thick skin, absent in most thin skin
- disperses keratohyalin around keratin fibers
- 2 - 5 layers of flattened, diamond-shaped cells
- produces keratohyaline granules
- lamellar bodies release lipids from cell
- cells die
- a total of 8-10 layers of many-sided cells
- produces keratin fibers
- lamellar bodies from inside keratinocytes
- deepest stratum of the epidermis
- single layer of cuboidal or columnar cells
- basement membrane of the epidermis attaches to the dermis
- produces cells of the most superficial strata
- melanocytes produce and contribute melanin, which protect agains ultraviolet light
- deep part of skin
- connective tissue composed of two layers
- is responsible for the structural strength and flexibility of the skin
- the epidermis exchanges gases, nutrients and waste products with blood vessels in the ____
- papillae project toward the epidermis: loose connective tissue
- -dermal papillae form fingerprints and footprints
- -dense irregular connective tissue
- -forms clevage lines