Chapter 5 Flashcards
Is an organ system because it consists of different organs, the skin, hair follicles, sweat glands, and sebaceous glands and other tissues that work toward a common goal
Integumentary system
The skin is only made up of two layers
Epidermis and dermis
Functions of the skin
Isolation
Sensitivity /Sensations
Secretions
Protection 1st line of defense
Permeability
Maintain body temp
Stores nutrients
Cells that make and secrete a protein called ________ that acts to make the epidermis water resistant
Keratin
The _______ is deep to the epidermis and the two layers are separated by a basal lamina
Dermis
The two regions of the dermis are the
Papillary
Reticular
Loose connective tissue. It is folded into dermal paplilae ridges where it meets the dermis at the basal lamina. These papillary folds are responsible for fingerprints
Papillary region
Deep portion of the dermis. It is made up of dense, irregular connective tissue, adipose tissue, and contains glands, glandular ducts, nerves, blood vessels, and other structures
Reticular region
Is also called the superficial fascia or hypodermis
Subcutaneous layer
It is deep to the dermis. It is composed of Areolar connective tissue with lots of adipose. It attaches the skin to the underlying structures, provides padding and nutrient storage, and stabilizes the skin while the deeper muscle and bone move. It is not part of the SKIN !
Subcutaneous layer
Hair grows in a structure called a
Hair follicle
Each follicle can have a ________ associated with it that secrete an oil called _____ that helps prevent drying and cracking of skin
Sebaceous gland
Sebum
Each follicle can also have a smooth muscle called ________ muscle that can cause the hair to stand erect or cause goose bumps
Arrector pilli
Serum ear wax
Ceruminous glands
Are holocrine glands that discharge an oily lipid secretion into hair follicles
The glands produce large quantities of these lipids called______?
These glands release the sebum through ______?
Sebaceous glands
Sebum
Holocrine secretion
Is a mixture of triglycerides, cholesterol, proteins, and electrolytes
Sebum
In the armpits, around the nipples, and in the pubic region, _______ secrete their products into hair follicles
These coiled, tubular glands produce a sticky, cloud, and potentially odorous secretion
Apocrine sweat glands
Eccrine sweat glands are also known as
Merocrine sweat glands
These coiled, tubular glands discharge their secretions directly onto the surface of the skin
Are far more numerous and widely distributed than apocrine sweat glands
Eccrine (merocrine) sweat glands
The sweat from eccrine sweat glands is called
Sensible perspiration
Are modified sweat glands in the passageway of the external ear. Their secretions combine with those of nearby sebaceous glands forming a mixture called cerumen or ear wax
Ceruminous
The distal portion that continues past the nail bed extends over the _____ an area of thickened stratum cornuem
Hyponychium
The nail body, the visible portion of the nail, covers an area of the epidermis called the
Nail bed
The nail body is recessed deep to the level of the surrounding epithelium and is bordered on either side by
Lateral nail grooves and lateral nail folds