Weeks 1&2 Flashcards
Anatomical variation
no affect on normal function. usually can’t tell there is a change unless you had a surgical procedure or imaging done
Congenital anomaly AKA..
birth defect. Can be mild to severe.
Expectations of anatomical variations
Students should realize that all bodies are unique, and there may be a change in where normal structure should be
What the skin provides
Protection from the external environment. Containment (holds the body and its parts together). Thermal regulation. Sensation. Synthesis and storage of vitamin D
Epidermis
Has a tough superficial layer, and a pigmented basal layer, which can also regenerate. NO blood vessels or lymphatic. Epidermis is nourished by the underlying dermis.
Dermis
Elastic and collagen fibers make this layer. Feeds the epidermis. Collagen fiber patterns determine how the skin will wrinkle.
Tension lines
Run longitudinally in the arms and legs, and runs transverse in neck and chest. In creases, it goes with the creased marks. Aging people wrinkle more because elasticity of skin decreases.
Arrector muscles of hair
Cause hair on skin to stand up. causes goose bumps. in the deep layer of the dermis
Subcutaneous
Between the superficial dermis and the deep fascia. Composed of connective tissues, sweat glands, blood, lymph and stored fat.
Where is most of the body fat storage?
subcutaneous tissue
Other functions of the subcutaneous layer
Cushioning, fat storage, and thermoregulation.
Skin ligaments
extend through the subcutaneous layer and into the dermis. Where they are long and sparse, there is more mobility in the skin, like the back of the hand. Where they are dense, there is less movement, such as the palm of the hand. Rigidity there.
Periosteum
bone covering
Bursae
sacs that can have serous membranes in them that can fill with fluid. Normal when they are empty and don’t take up space. Problem when they fill.
Partietal vs visceral layer
Parietal is adjacent to the body cavity wall. Visceral more internal?
