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Chapter 4

Integumentary System and Body Membranes

dry membrane, outermost protective boundary Epithelial membranes
keratinized stratified squamous epidermis Superficial epidermis
mostly dense connective tissue underlying dermis
surface epithelium , lines all body cavities that open to the exterior body surface Mucous membranes
surface simple squamous epithelium, underlying areolar connective tissue Serous membrane
outer pariteal
inner visceral
abdominal cavity peritoneum
around the lungs pleura
around the heart denardium
synovial membrane connective tissue membrane
helping to reduce friction to our joints synovial fluid
outer layer of the skin Epidermis
containing fibroblasts, adipocytes and macrophages Dermis
they are tear resistant Dermis
most superficial stratum of the epidermis Stratum corneum
It consist of dead squamous cells filled with keratin Stratum corneum
thin layer of cells is found only in the thick skin stratum lucidum
due to further changes to the keratinocytes as they pushed from the stratum spinousm Stratum granulosum
spriny appearance due to protruding cell processes that join the cells via structure Stratum Spinosum
consist of cuboidal or columnar cells that undergo mitotic divisions about every 19 days Stratum basale
deep to dermis is the hypodermis
subcutaneous layer and this is a adipose tissue they anchor the skin to underlying organs hypodermis
group of pigments primarily responsible for skin, hair, and eye melanin
color is yellow to brown to black melanin
package melanin to vesicles Melanosome
they help bind our body together dermis
upper dermal region papillary layer
deepest skin layer reticular layer
prevent bacteria to enter deeper into the body tissue Phagocytes
consists of collagen and elastic fibers Phagocytes
yellow, brown or black pigments Melanin
orange - yellow pigment from some vegetables carotene
red coloring from blood cells in dermis capillaries Hemoglobin
oxygen content determines the extent of red coloring Hemoglobin
they produce oils Sebaceous Glands
keeps our skin soft and moist Sebum
also called sudoriferous glands Sweat glands
open viaduct to pore on skin surface Eccrine
they produce sweat Eccrine
ducts empty into hair follicles Apocrine
epithelia tissue, very flexible and fast growing tissue Hair
consists of large cells and air spaces Central Medulla
covers the medulla Cortex
outside of cortex Cuticle
dermal and epidermal sheath surrounding hair root hair follicle
outer part and is mostly composed of dermal connective tissue Fibrous sheath
provied blood supply to the matrix inside the hair bulb Hair Papilla
small bands of smooth muscle cells They are the one that keeps your hair erected Arrector Pill
scale-like modifications of the epidermis Nails
is found all at the proximal area and responsible for nail growth Nail Matrix
proximal nail fold that projects onto the nail body Eponychium
caused by fungal infection, also known as tinea pedis Athlete's foot
caused by bacterial infection Boils and Carbuncles
inflammation of the hair follicles and sebaceous glands Boils and Carbuncles
caused by virus - herpes simplex virus, usually caused by U.V light exposure cold sores
exposures cause allergic reaction contact dermatitis
caused by bacterial infection, usually develop around mouth and nose Impetigo
caused by over production of our skin cells Psoriasis
tissue damage and cell death caused by heat, electricity, UV radiation or chemicals Burns
way to determine the extent of burns rule of nines
each area represents about? 9%
only epidermis is damaged First-degree burn
epidermis and upper dermis are damaged Second-degree burn
destroys entire skin layers Third-degree burn
abnormal cell mass cancer
does not spread Benign
metastasized to other parts of the body Malignant
most common type of skin cancer Basal cell carcinoma
arises from stratum spinosum, fast growing and they metastasize easily to the lymph nodes Squamous cell Carcinoma
most deadly of skin cancer Malignant Melanoma
Created by: arri019