regulate temperature, conserve water, rid waste, produce vitamin d
What other 4 functions can the organ Skin provide?
The epidermis of the skin is made of what particular kind of epithelial cells?
resisting abrasion, drying out
The epidermis layer allows protection by ___ ___ as well as provides protection from ___ __.
Nutrients reach the epidermis by ____ through the tissue fluid from blood vessels in the dermis.
Besides storing ___, the hypodermis ____ the skin to underlying structures such as muscles.
The dermis layer provides the ___ ___ that makes it possible for the skin around the elbow to bend.
EPIDERMIS: Several layers of keratinocytes unified by desmosomes. Cells contain thick bundles of filaments made of pre-keratin. Begin of lamellar body.
____ ____ are formed in the keratinocytes of the stratum spinosum and stratum granulosum. When the keratinocyte matures to the stratum corneum, enzymes degrade the outer envelope of these, releasing types of lipids called free fatty acids and ceramides.
EPIDERMIS: Three to five layers of flattened cells; organelles deteriorating; cytoplasm full of lamellated granules and keratohyaline granules.
The stratum granulosum is named so because of it's ___ appearance caused by an abundance in kerathyaline granules.
Above the stratum ___, the epidermal cells are too far from the dermal capillaries and are cut off from nutrients by the glycolipids that coat their external surfaces, so THEY DIE.
Most superficial layer, all dead cells represented by flat membranous sacs filled with keratin.
Which stratum of the epidermis provides the most protection from drying out, as it is not in an interior, moist environment?
The major portions of hair follicles, as well as oil and sweat glands, are derived from epidermal tissue but reside in the ___.
In the papillary layer of dermis, there are ___ that protrude into the epidermis above. This is how the epidermis diffuses nutrients.
___ ___ are made up collectively of the dermal and epidermal ridges, and allow gripping ability of fingers and toes.
What type of connective tissue composes that of the reticular layer of the dermis?
Fibrous protein found in the epidermis, hair, and nails that makes those structures hard and water resistant; precursor is kerstohyaline.
Tiny, smooth muscles attached to hair follicles; contraction causes the hair to stand up.