knes 205- chapter 7 the nervous system

arachn/o

spider

cephal/o

head

cerebell/o

cerebellum

cerebr/o

cerebrum; also, the brain in general

cortic/o

outer layer or covering

crani/o

cranium, skull

encephal/o

brain

gangli/o

swelling or knot

ganglion/o

swelling or knot

gli/o

glue

hydr/o

water

iatr/o

physician; to treat

-mania

mental abnormality or obsession

meningi/o

membrane

ment/o

referring to the mind

-mnesia

memory

myel/o

in connection with the nervous system, refers to the spinal cord and medulla oblongata

neur/o

nerve, nerve tissue

-oid

resembling

-paresis

slight paralysis

-phasia

speech

-phobia

fear

-plegia

paralysis

psych/o

mind

schiz/o

to split

spin/o

spine

Function of the nervous system

-most complex system in the body

-coordinates involuntary and voluntary actions

-maintains homeostatis in the body

-two major divisions: central nervous system (cns), peripheral nervous system (pns)

Neurons

(nerve cells)

neuroglia

separated, supported, and protected by specialized cells

what do neurons carry?

electrical messages that coordinate the exchange of information between the body’s internal and external environment

parts of a neuron cell

cell body: contains nucleus and genetic material

dendrites: receive and transmit messages

axon: conducts nerve impulses; covered by myelin, a white fatty material that provides protection and insulation