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What are some basic characteristics of epithelial tissue?
-cover and protect organs
-always have one free or exposed surface
-lack blood vessels
-divide easily and rapidly
-tightly packed with little intercellular space
Distinguish between squamous, cuboidal, and columnar epithelium.
squamous - flat cell
cuboidal - cube-shaped cell
columnar - column-shaped cell
Distinguish between simple, stratified, and pseudostratified epithelium.
simple - single layer of cells
stratified - more than one layer of cells
pseudostratified - appear to be layered but are not
What type of epithelium is specialized to change in response to increased tension?
What is keratinization and where does it occur?
Cells accumulate keratin. They harden and die. This produces a hard, tough protective material.
outer layer of skin
What type of gland secretes its products into ducts that open on to an internal or external surface?
What is carcinoma?
cancer that originated in the epithelium (ex. skin, airways, stomach, intestines)
What are the 3 types of exocrine glands and how are they classified?
merocrine - release watery, protein rich fluids by exocytosis (ex. pancreatic gland)
apocrine - lose small portions of their glandular cell bodies during secretion (ex. mammary gland)
holocrine - entire cell lyses during secretion (ex. sebaceous gland)
What does the term "wandering" mean?
number of cells is unstable, can reproduce and go very high or stay at normal amount
What are the 3 types of fiber produced by fibroblasts?
collagenous fibers, elastic fibers, and reticular fibers
What are the 3 types of blood cells that make up blood and what is the function of each?
white blood cells - fight diseases
red blood cells - transport oxygen
platelets - clot blood
What are the 3 types of muscular tissue?
skeletal muscle tissue, smooth muscle tissue, and cardiac muscle tissue
Where is smooth muscle tissue found?
walls of internal organs (ex. stomach, intestines, blood vessels)
What do neuroglial cells do?
support and bind components of nervous tissue, carry on phagocytosis, and help supply nutrients to neurons by connecting them to blood vessels
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