Bio 210 lecture exam 2 Complete Solutions
Integumentary system - ️Comprises the skin and its derivatives.
The integument - ️Refers to the skin covering the entire body. - ️Also known as the cutaneous membrane.
Dermatology - ️Is the scientific study and treatment of the integumentary s...
Bio 210 lecture exam 2 Complete Solutions
Integumentary system
- ✔️Comprises the skin and its derivatives.
The integument
- ✔️Refers to the skin covering the entire body.
- ✔️Also known as the cutaneous membrane.
Dermatology
- ✔️Is the scientific study and treatment of the integumentary system.
The integument
- ✔️Is the body's largest organ.
Layers of the skin
- ✔️The epidermis is composed of stratified squamous epithelium.
- ✔️The dermis is the deep layer, primarily consisting of dense irregular connective tissue.
,- ✔️The subcutaneous layer, although not considered part of the true skin (integument), is part of the
integumentary system. It lies deep to the dermis and consists of areolar and other connective tissues,
also known as the hypodermis or superficial fascia.
Thick skin
- ✔️Found on the palms of hands, soles of feet, and surfaces of fingers and toes.
- ✔️Contains all five layers of the epidermal strata and has sweat glands.
- ✔️Lacks hair follicles and sebaceous glands.
Thin skin
- ✔️Lacks a stratum lucidum but has sweat glands, hair follicles, and sebaceous glands.
Hemoglobin
- ✔️Is an oxygen-binding compound that gives a bright red color when oxygenated.
- ✔️Becomes more visible when blood vessels dilate.
Melanin
- ✔️Pigment that can be black, brown, tan, or yellow-brown shades.
,Melanocytes
- ✔️Cells where melanin pigment is produced and stored.
UV light
- ✔️Stimulates melanin production.
- ✔️Results in darker-skinned individuals producing more and darker-colored melanin.
Carotene
- ✔️Yellow-orange pigment acquired from vegetables.
- ✔️Is converted to vitamin A within the body.
Nevus
- ✔️Also known as a mole, it's a harmless overgrowth of melanin-forming cells.
Freckle
- ✔️Yellowish-brown spots that represent localized areas of increased melanocyte activity.
Hemangioma
, - ✔️A skin discoloration caused by a benign blood vessel tumor.
Capillary hemangiomas
- ✔️Usually present at birth and disappear in childhood, often called strawberry-colored birthmarks.
Cavernous hemangiomas
- ✔️May last a lifetime and are known as port-wine stains.
Friction ridges
- ✔️Complex arches and whorls found on fingers, palms, soles, and toes.
- ✔️Formed by large folds and valleys of the dermis and epidermis.
- ✔️Help increase friction on contact.
- ✔️Each individual has a unique pattern of these ridges.
Dermis
- ✔️Is deep to the epidermis and composed of connective tissue.
Two layersof the dermis ✔️papillary and reticular layer
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