Chapter-3 The Integumentary System (Dermatology) Flashcards
Function of the Skin
Skin is the first line of defense from germs and irritants.
It also serves as the body’s first point of contact with its surroundings
Your skin is your largest organ
What is the integumentary system?
The Skin and all the accessory organs (i.e. hair, nails, glands, etc.)
What is the outermost layer of your skin called?
Epidermis
It is the layer that is visible.
What is the epidermis made of?
It is made up of large cells that look like scales of a fish under the microscope.
The term squamous cell refers to the scaly appearance.
What is the layer that lies deeper than the epidermis?
Dermis Layer
How does the composition of the dermis differ from the epidermis?
The dermis layer, which is much thicker than the epidermis, has fewer cells and more fibers to give the skin strength and flexibility.
The dermis is home to what?
Home to hair follicles, nerves, and glands.
What are hair follicles?
The roots of hair (pilo/tricho).
Follicles anchor the hair to the skin and provide nourishment to it.
What do the nerves of the dermis do?
Nerves detect fine pressure, deep pressure, temperature, and pain.
The vast network of nerves in your skin makes it the largest sensory organ in the body.
What are glands?
Groups of cells that release fluid.
What are the two types of glands in the skin?
1) Sweat glands (hidro) and
2) Sebaceous glands (sebbaco)
What do sweat glands do?
Sweat glands (hidro) release sweat:
1) to rid the body of waste and
2) to cool the body
What do sebaceous glands do?
Sebaceous glands (sebacco) secrete oil as a natural moisturizer for the skin and hair.
What are the nails (finger and toes) made of?
Nails are specialized tissue made of a hard substance called keratin.
Nails protect your fingers and toes and provide a good base of movement.
adip/o
Def: Fat
Ex. Adipocyte (fat cell)
lip/o
Def: Fat
Ex. Lipoma (fatty lump most often situated between the skin and underlying muscle layer)
steat/o
Def: Fat
Ex. Steatosis (fatty change that is an abnormal retention of fat within a cell or organ).
cutane/o
Def: Skin
Ex. Subcutaneous (situated or applied under the skin)
derm/o
Def: Skin
Ex. Epidermal (outermost layer of the skin/ upon dermal layer)
dermat/o
Def: Skin
Ex. Dermatology (study of skin, hair, and nails)
pil/o
Def: hair
Ex. Piloid (resembling hair; hairlike)
trich/o
Def: Hair
Ex. Atrichosis (absence of hair, congenital or acquired)
Schizotrichia (condition of hair split ends)
hidr/o
Def: Sweat
Ex. Hyperhidrosis (abnormally excessive sweating that is not necessarily related to heat or exercise)
Hypohidrosis (condition that causes a person to sweat less than usual)
Squam/o
Def: Scale
Ex. Squamous layer
Desquamation (process of removing the scales either from sunburn resulting in skin peeling or from removing the scales of a fish).