Integumentary System: Ch 5 Flashcards
(39 cards)
Oxygenated, valves, carries blood away from the heart
Artery
Deoxygenated, carries blood to the heart
Vein
The three regions of the skin
Epidermis, dermis, hypodermics
Superficial region
Epidermis
Middle region
Dermis
Deepest region, mostly adipose tissue
Hypodermis
A specialized cell of the epidermis: proton keratin, waterproof
Keratinocytes
A specialized cell of the epidermis: it is in the lower epidermis and contains pigment melanin for skin color
Melanocytes
A specialized cell of the epidermis: macrophages for immunity
Langerhans cells
A specialized cell of the epidermis: tactile(touch) receptors
Tactile(merkel) cells
Order of the layer from superficial to deep
CLGSM
A layer of the epidermis with 20-30 rows that is flat and keratinized: it protects, waterproofs, and acts as a barrier
Stratum corneum
A clear layer of the epidermis in thick-skinned palms of hands and soles of feet. It’s rows are flat and dead keratinocytes. It’s function is protection.
Stratum lucidum
A thin layer of the epidermis which the cells are beginning to flatten. It contains keeatohyaline and lamellated granules accumulations. Granular layer.
Stratum granulosum
Prickly layer of the epidermis with a web like system of prekeratin filaments attached to desmosomes (cell junction). Abundant melanin granules and dandratic cells for immunity.
Spinosum
The deepest layer of the epidermal firmly attached to the dermis. It contains a single row of stem cells. Cells undergo rapid division or are highly mitotic. Skin grows from inside to out and the journey from basal layer to surface takes 25 to 45 days.
Stratum basale
The best only dry membrane which has three regions
Skin
This is a region of the skin that has strong connective tissue, contains all tissue types, and has two layers.
Dermis
The two layers of the dermis
Papillary and reticular
A layer of the dermis that has areolar connective tissue with collagen and elastic fibers and blood vessels. It contains capillary loops, meissner’s corpuscles, and free nerve endings.
Papillary layer
A thick layer of the dermis that contains collagen fibers which provide strength and resiliency. It also contains elastic fibers which provide stretch and recoil properties.
Reticular layer
Epidermal nidges atop papillary ridges to form this of fingerprints.
Friction ridges
Collagen fibers arranged in bundles form this. Incisions made parallel to theses heal more readily.
Cleavage lines
What are the three pigments that contribute to skin color?
Melanin, carotene, hemoglobin