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Definition
| A group of similar cells that work together to perform a function |
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Definition
is the lowermost layer of the integumentary system in vertebrates. Types of cells that are found in the hypodermis are fibroblasts, adipose cells, and macrophages. The hypodermis is used mainly for fat storage. |
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| What is the purpose of keratin? |
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Definition
| Keratins are a family of fibrous structural proteins; tough and insoluble, they form the hard but nonmineralized structures |
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Definition
A callus (or callosity) is an especially toughened area of skin which has become relatively thick and hard as a response to repeated contact or pressure. Since repeated contact is required, calluses are most often found on hands or feet |
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Definition
| Melanocytes are cells located in the bottom layer (the stratum basale) of the skin's epidermis and in the middle layer of the eye |
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Term
| What is the function of melanin? |
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Definition
| In humans, melanin is the primary determinant of human skin color and also found in hair, the pigmented tissue underlying the iris |
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Term
What are epidermal dendritic cells |
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Definition
| immune cells. Their main function is to process antigen material and present it on the surface to other cells of the immune system, thus functioning as antigen-presenting cells.Dendritic cells are present in small quantities in tissues that are in contact with the external environment, mainly the skin |
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Term
| What is the function of a merkel disc? |
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Definition
| Merkel cells are associated with a sensory nerve ending. Together, they form a complex known as a Merkel disc, which functions as a sensory receptor for touch |
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Term
| What are the 5 layers of the epidermis? |
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Definition
| stratum basale stratum spinosum stratum granulosum stratum licidum stratum corneum[image] |
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Term
| What is the composition of the dermis? |
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Definition
| The dermis is a layer of skin between the epidermis and subcutaneous tissues, and is composed of two layers, the papillary and reticular dermis.[1] Structural components of the dermis are collagen, elastic fibers, and extrafibrillar matrix (previously called ground substance |
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Term
| what is the dermal papillae? |
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Definition
| The dermal papilla are extensions of the dermis into the epidermis. They can sometimes be observed at the surface of the skin |
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Term
| What are the patterns of dermal papillea? |
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Definition
| Rows of papillae protruding from the dermis into the epidermis form ridges that create patterns on the skin of the hands, feet, and body. These papillary ridges on the fingertips are responsible for fingerprints. |
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Term
| What are the predominant connective tissue fiber type in the dermis? |
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Definition
| Collegan and elastic fibers |
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Definition
Freckles are clusters of concentrated melanin which are most often visible on people with a fair complexion. A freckle is also called an "ephelis." |
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Definition
| Alopecia or hair loss is the medical description of the loss of hair from the head or body, sometimes to the extent of baldness. |
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Term
| what is basal cell carcinoma? |
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Definition
| Basal cell carcinoma is a type of skin cancer. It is a malignant epithelial cell tumor that begins as a papule (a small, circumscribed, solid elevation of the skin) and enlarges peripherally, developing into a crater that erodes, crusts and bleeds. |
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Term
| what is the arrector pili muscle for? |
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Definition
| Arrectores pilorum (singular Arrector pili) are tiny muscle fibers attached to each hair follicle, which contract to make the hairs stand on end, causing goose bumps |
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Term
| What is squamous cell carcinoma? |
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Definition
| (SCC) is a form of cancer of the carcinoma type that may occur in many different organs, including the skin, lips, mouth, esophagus, urinary bladder, prostate, lungs, vagina, and cervix. It is a malignant tumor of squamous epithelium |
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Term
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Definition
| Melanoma is a malignant tumor of melanocytes which are found predominantly in skin but also in the bowel and the eye (see uveal melanoma). It is one of the rarer types of skin cancer but causes the majority of skin cancer related deaths. |
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Term
| ABCD of melenoma recognition |
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Definition
| Asymmetrical skin lesion. Border of the lesion is irregular. Color: melanomas usually have multiple colors. Diameter: moles greater than 6 mm are more likely to be melanomas than smaller moles. |
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Term
| What are the three types of burns? |
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Definition
Superficial burn or first degree burn: Partial thickness burn or second degree burn: Full thickness burn or third degree burn: |
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Term
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Definition
Lanugo is fine, downy hair; it is a type of pelage Lanugo grows on fetuses as a normal part of gestation, but is usually shed and replaced by vellus hair at about 40 weeks of gestational age |
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Term
| What glands produce milk? |
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Definition
| Glands such as the mammary glands which produce breast milk |
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Term
| What types of glands produce wax |
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Definition
| Ceruminous glands are specialized sudoriferous glands (sweat glands) located in the external auditory canal. They produce cerumen or earwax to lubricate and clean the auditory canal. |
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Term
| How does skin make vitiam D |
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Definition
Vitamin D is necessary for strong bones. Skin helps make the vitamin D precursor from cholesterol. But vitamin D does not put calcium into our bones! It actually causes the breakdown of bones and the release of calcium into our blood. But here’s the trick… if the body knows that it cannot get calcium from our bones (vitamin D deficiency) it will refuse to put calcium into our bones! |
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