topic2 Flashcards
4 types of tissues
-connective tissue
-epithelial tissue
-muscle tissue
-nervous tissue
epithelial tissue
tightly packed cells that form a continuous layer
true or false: epithelium tissue is avascular
true, it lacks its own blood supply
functions of epithelium (5)
protection, filtration, secretion, absorption and excretion
covering and lining epithelium
forms the outer covering of the skin and some internal organs, also in the inner lining of blood vessels, ducts, and body cavities
glandular epithelium
secreting portion of glands such as the thyroid gland, adrenal glands, and sweat glands
shapes of lining epithelium
-squamous (flat)
-cuboidal
-columnar (rectangular)
simple epithelium
single layer of cells that function in diffusion, osmosis, filtration, secretion, and absorption.
stratified epithelium
two or more layers of cells that protect where there is considerable wear and tear
pseudostratified epithelium
single layer of cells, but appears to be layered
glandular epithelium
endocrine: secrete into the bloodstream
exocrine: secrete onto the surface
connective tissue
-binds together, supports, and strengthens other body tissues.
-protects internal organs
-serves as a major blood transport system
-main source of immune responses.
t o f: connective tissue has cells that are widely separated by a matrix
true
muscle tissue
produces body movements, maintains posture, and generates heat
3 types of muscle tissue
-smooth muscle tissue
-cardiac muscle tissue
-skeletal muscle tissue
skeletal muscle tissue
VOLUNTARY. attached to bones of the skeleton, it can contract or relax by oneself. has striations
cardiac muscle tissue
INVOLUNTARY. found in the wall of the heart
smooth muscle tissue
INVOLUNTARY. found in walls of internal structures (stomach, blood vessels)
4 properties of muscular tissue
-electrical excitability
-contractility
-extensibility
-elasticity
nervous tissue
neuron and neuroglia
parts of a neuron (3)
-cell body (nucleus)
-dendrites (conduct signals)
-axon (output)
