Monday, March 17, 2008

Basic Eye Anatomy Worksheet


1. The eye is part of which nervous system? central nervous system
2. What types of tissues give the eye protection? the fatty and connective tissue

3. What structure in the eye produces tears? Lacrimal glands
4. What acts as an antibacterial layer in the eye? conjuctiva
5. What is the cornea? the anterior portion of the sclera. The cornea is transparent so the light rays can enter the eye.
6. What layer of the eye contains the rods and cones? retina
7. What is the function of the rods? The cones? Rods: night vision. Cones: daylight vision and color vision.
8. What is the colored part of the eye? iris
9. What structure allows light to enter the eye? pupil
10. Sketch picture of eye with following labeled: lacrimal glands, eyelashes, iris, pupil, cornea, lens, eyelid, sclera, choroids, optic nerve, and retina
(above)

Baisc Ear Anatomy Worksheet


1. Sketch a picture of an ear and label the following: (above)
Inner ear
middle ear
outer ear
pinna
tympanic membrane
cochlea
stapes
malleus
incus
2. What is the function of the following:
Pinna- cartilage flap that conveys sounds waves into the ear.
tympanic membrane - converts sounds waves into sound vibrations.
ossicles - three small bones which magnify sound vibrations
cochlea - contains fluid and changes sound vibrations into nerve impules.
semicircular canals - sends impulses to the brain to let it know your body is off balance.
3. What three bones make up the ossicles? - incus -stapes - malleus
4. What is the function of hairs in the ear?
stimulate nerve impulses to be sent to the brain by way of the auditory nerve.

Thursday, March 6, 2008

Basic Nervous SYstem Anatomy


1)What does CNS and PNS stand for? Central Nervous System and Peripheral Nervous System!
2)What are the parts of the CNS? brain and spiral cord and it controls thinking, memory and behavior.
3)Describe something that you do on a regular basis that your PNS controls. carry messages through out the body.
4)What are the two divisions of the autonomic nervous system and what does each control? Sympathetic branch controls the body in times of stress, worry, fear,and emergency. Parasympatic branch brings the body back to a normal state and allows for rest and relaxation to occur.
5)What are the three main types of neurons? sensory neuron, motor neuron, and interneuron! What is the function of each? interneuron only conducts within the CNS. motor neurons takes the impulse from the CNS to the foot for actions. sensory neuron conduct the impulse from the foot to the CNS.
6)What is the function of the axon of a nerve cell? The dendrite?
7)What is a synapse? simply the conduction of an impulse from one neuron to another.
-Sketch a neuron and label the axon and the dendrite. (above)