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skin and body membra
a&p
| Question | Answer |
|---|---|
| Function of the body membrane | Cover surfaces, lines body cavities and form protective sheets around body organs |
| 2 types of body membrane | epithelial and connective tissue |
| 5 Characteristics of epithelial tissue | fit closly together to form continuous sheets-always have one free surface or edge-lower surface rests on a basement membrane secreted by the cell-they have no blood supply-if well nourished will regenerate themselves easily |
| Classifications of epithelial cells | simple, stratified, squamous, cuboidal,columnar |
| Simple epithelia | are most concerned with absorption, secretion, and filtration. because it is usually very thin, protection is not one of its specialties. |
| Simple squamous epithelium | a single layer of cells resting on a basement membrane common in glands and thier ducts, usually forms membrane where filtration of exchange of substances by rapid diffusion occurs, ex air sacs of the lungs ventral body cavity |
| Simple cuboidal epithelium | one layer of cubbe shhaped cells resting on a basement membrane, common in glands and thier ducts, salivary glands,pancreas, walls of kidney tubules, surface of ovaries |
| simple columnar epithelium | tall cells single layer that fit closely together, goblet cells which produce a lubricating mucus are often seen in this type of epithelium, line the entire digestive tract from the stomach to the anus. |
| mucus membrane | membranes that line body cavities open to the body exterior are called______ such as those of hollow organs of the respiratory, digestive,urinary and reproduction tracts |
| Sratified epithelia | consists of 2 or more cell layers, being more durable than the simple epithelia, the epithelia function primarily to protect |
| Stratified squamous epithelium | the most common stratified epithelium in the body, consists of several layers of cells, found in sites that recieve a good deal of abuse such as the esophagus,mouth and outer portion of the skin |
| Stratified cuboidal epithelium | typically just 2 cell layers with at least the surface cells cube shape |
| Transitional epithelium | a highly modified, stratified squamous epithelium that forms the linning of only a few organs the urinary blader, ureters and urethra, properties elastic like |
| Glandular epithelium (Gland) | consists of on or more cells that make and secrete a particular product |
| Endocrine glands | lose there connection to the surface(duct) thus they are often called ductless glands, they secrete hormones directly into the blood vessels (thyroid,adrenals,and pituitary |
| Exocrine glands | retain thier ducts,thier secretion empty thru the the duct to the epithelial surface,examples sweat and oil glands,liver, and pancreas |
| Cutaneous membrane | skin,its superficial epidermis is composed of keratinizing stratified squamous epithelium, underlying dermis dense fibrous connective tissue, |
| Serous membrane | composed of layer of simple squamous epithelium resting on a thin layer of areolar connective tissue in contrast mucus membrane which line open body cavities ____ ______line body cavitiesthat are closed to the exterior |
| parietal layer | lines a specific portion of the wall of the ventral body cavity |
| visceral layer | parietal layer folds into itself to form the_____ ______ closest to the organ |
| Peritoneum | the serosa lining that covers the abdominal cavity |
| Pleura | Isolates the heart and lungs |
| pericardium | surrounds the heart |
Created by:
crackl
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