Details Title: A & P Description: integumentry Total Flash Cards: 27 Created: 10/23/2008 15:34:21		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Anatomy Flashcards
Cards in this set: Term Tissue Definition A group of similar cells that work together to perform a function Term Hypodermis 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. Term What is the purpose of keratin? Definition Keratins are a family of fibrous structural proteins; tough and insoluble, they form the hard but nonmineralized structures Term What is a callus? 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 Term What is a melanocytes? 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 Term What is the function of melanin? Definition In humans, melanin is the primary determinant of human skin color and also found in hair, the pigmented tissue underlying the iris Term What are epidermal dendritic cells 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 Term What is the function of a merkel disc? 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 Term What are the 5 layers of the epidermis? Definition stratum basale stratum spinosum stratum granulosum stratum licidum stratum corneum Term What is the composition of the dermis? 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 Term what is the dermal papillae? Definition The dermal papilla are extensions of the dermis into the epidermis. They can sometimes be observed at the surface of the skin Term What are the patterns of dermal papillea? 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. Term What are the predominant connective tissue fiber type in the dermis? Definition Collegan and elastic fibers Term Definition Term what is a frekle? 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." Term What is alopecia? 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. Term what is basal cell carcinoma? 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. Term what is the arrector pili muscle for? 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 Term What is squamous cell carcinoma? 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 Term What is melenoma? 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. Term ABCD of melenoma recognition 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. Term What are the three types of burns? Definition Superficial burn or first degree burn: Partial thickness burn or second degree burn: Full thickness burn or third degree burn:   Term What is lanugo? 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 Term What glands produce milk? Definition Glands such as the mammary glands which produce breast milk Term What types of glands produce wax 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. Term How does skin make vitiam D 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! Term Definition