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lettered items. Following that is a list of numbered items. Each numbered item is followed by a drop-down. Select the letter in the drop down that best matches the numbered item with the letteredalternatives.a.Layers of dead cellsb.Dense irregular connective tissuec.Areolar connective tissued.Deepest layer of epidermise.Produce melanin for protection against UVlight1. Papillary layer of dermis2. Reticular layer of dermis
3. Melanocytes4. Stratum basale5. Stratum corneumSkin colorSkin color is attributed to three pigments:1. melanin (melanocytes) in the epidermis2. carotene (orange pigment) that can accumulate in the stratum corneum3. hemoglobin in the dermis. When hemoglobin attaches to oxygen it is red; when it is deoxygenated it isblue. When a patient has a blue color due to poor oxygenation of hemoglobin we speak of CYANOSIS.SKIN DERIVATIVESHairHair is really an outgrowth of epidermis. You can see in this picture that the epidermis seems to extenddown around the hair root.2 components of hair are: shaft and rootAt the bottom of the root is the hair follicle. A papilla (nipple-like projection) at the bottom of the folliclebrings blood vessels to the MATRIX of the hair, the part of the hair that actually undergoes mitosis toproduce the hair. Hair is made up of the protein keratin (hard keratin, a different form than is found in thestratum corneum of the skin).Root hair plexus are sensory nerves that surround the base of the hair follicle.When the matrix of a hair is destroyed, the hair will no longer grow back.Sebaceous GlandsSebaceous gland ducts generally lead into a hair follicle. The arrow shows a sebaceous gland that secretesCheck Answer
into a hair follicle.Sebaceous glands are holocrine glands that secrete their product (sebum) together with the entire cell.Sebum is made up of oils that keep the hair (and skin) moist and inhibits bacterial growth. Sebaceousglands become extremely active during puberty. Because of their holocrine secretion, they often becomeinfected.Sweat Glands (sudoriferousglands)Sweat glands are important structures in regulating body temperature. The sweat gland is found near the

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Term
Spring
Professor
N/A
Tags
Physiology, Anatomy, cells, Stratum Corneum, Sebaceous gland

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