| A | B |
|---|
| central nervous system | brain and spinal cord |
| peripheral nervous system | cranial nerves, spinal nerves |
| skull, meninges, cerebrospinal fluid | protects brain |
| vertebrae, meninges, cerebrospinal fluid | protects spinal cord |
| cerebrum | controls thoughts, memories, senses |
| cerebellum | controls balance, coordinated movement |
| medulla oblongata | controls involuntary movement including heartbeat, respiration |
| left hemisphere | contains speech centers, controls logical thought |
| right hemisphere | contains artistic centers, intuitive thought |
| spinal cord | connects PNS to brain;controls reflexes |
| reflex | automatic response that need not involve the brain |
| somatic nervous system | controls movement of skeletal muscle |
| autonomic nervous system | controls movement of smooth and cardiac muscle |
| parasympathetic nervous system | "normal" part of autonomic NS |
| sympathetic nervous system | emergency part of autonomic NS |
| acetylcholine | neurotransmitter of parasympathetic nerves |
| noradrenaline | neurotransmitter of sympathetic nervous system |
| choroid | middle layer of eye |
| sclera | outer, white, protective layer of eye |
| cornea | transparent part of sclera at front of eye |
| aqueous humor | watery fluid behind cornea |
| vitreous humor | transparent gel behind lens |
| lens | focuses light on retina |
| iris | colored part of choroid - dilates and contracts |
| pupil | hole in the iris that lets light into eye |
| retina | inner layer of eye, contains receptors |
| rods | receptors for low light |
| cones | receptors for color |
| optic nerve | cranial nerve attaching eye to brain |
| acoustic nerve | cranial nerve attaching receptors of ear to brain |
| outer ear | auricle, auditory canal, outside of eardrum |
| middle ear | inside of eardrum, hammer, anvil, stirrup |
| inner ear | cochlea and semicircular canals |
| sound receptors | receptors in cochlea |
| balance receptors | receptors in semicircular canals |
| oval window | thin spot on cochlea where stirrup presses |
