Assessing the Integumentary System Flashcards
Heaviest single organ of the body
Skin
Skin is _____ of body weight
16%
Skin Includes appendages such as
hair follicles and sebaceous glands
Three layers of the skin
epidermis, dermis, subcutaneous layers
Functions of the Skin
- Protect underlying structures from physical trauma and UV radiation
- Essential in maintaining body temperature, fluid and sensation
- Involved in absorption and excretion, immunity, and synthesis of vitamin D from the sun
- Outer visible layer
- Avascular
- Contains keratin
Epidermis
Dermis is made up of
proteins and mucopolysaccharides
dermis contains
nerve tissues, blood vessels, sweat and sebum glands, and hair follicles
Made up of fatty connective tissue
Subcutaneous Layer
Made up of keratinized cellsh
Hair
Grows from hair follicles supplied by blood vessels
Hair
Types of Hair
Vellus and Terminal hair
Functions of Hair
Provides protection by covering the scalp and filtering dust and debris away from the nose, ears, and eyes
Short, pale, and fine hair
Vellus hair
- Dark and coarse
scalp, brows, legs, axillae and perineum
Terminal hair
Terminal hair can be found on the
scalp, brows, legs, axillae and perineum
Made up of hard, keratinized cells and grow from a nail root under the cuticle
Nails
Function of Nails
Protect the distal ends of the fingers and toes and aid in picking up objects
Other structures of the nail
free edge, nailbed, lunula
Vascular supply of nails is on the ___________; gives the nail
a pink color
nailbed
Fingernails grow approximately __________ daily
0.1mm
produce fatty substance secreted onto the skin surface through the hair follicles and lubricates the hair shaft
Sebaceous gland
2 types of sweat glands
Eccrine glands
Apocrine glands
- Widely distributed, open directly onto the skin surface
- Help control body temperature
Eccrine glands