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triangular shoulder muscle that abducts the arm and is used as an injection site

biceps brachii

upper arm muscle that flexes the lower arm

triceps brachii

upper arm muscle that extends lower arm

pectoralis major

upper chest muscle that adducts and flexes upper arm

muscular dystrophy

group of inherited diseases that lead to chronic progressive muscle atrophy

myasthenia gravis

chronic condition in which nerve impulses are not transmitted properly to the muscles


large part of the brain that controls the senses and thinking


the "little brain" attached to the rear of the brainstem; it helps coordinate voluntary movement and balance

medulla oblongata

the base of the brainstem; controls heartbeat and breathing

dura mater

outermost brain covering

arachnoid membrane

which resembles a spider web, is the second layer of the meninges and is located between the dura mater and the pia mater

pia mater

thin, delicate inner membrane of the meninges

cerebrovascular accident



disorder affecting the central nervous system, characterized by recurrent seizures

cerebral palsy

a loss or deficiency of motor control with involuntary spasms caused by permanent brain damage present at birth

Parkinson's disease

a progressive disease that destroys brain cells and is identified by muscular tremors, slowing of movement, and partial facial paralysis


white of eye


a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening


ear wax

tympanic membrane

The eardrum. A structure that separates the outer ear from the middle ear and vibrates in response to sound waves.

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