Parts of the Nervous System
What are the 3 main parts of the nervous system?
Brain, spinal cord, nerves
Light enters through the _________
pupil
What is the function of the outer ear?
To funnel sound into the ear canal
Which two senses rely on chemicals to interpret information?
Smell and taste
Another name for nerve cells
neurons
The colored part of your eye is called the __________
iris
What is the outer, middle, and inner ear?
Outer- part you can see
Middle - eardrum and 3 bones
Inner - cochlea
Which two senses rely on waves to interpret information
Sight and sound
What is the order of parts from smallest to largest:
Organ system, tissue, cell, organ
Cell, tissue, organ, organ system
The bundle of nerves in the back of the eye is called the __________
retina
What does the cochlea do?
Transforms sound waves into electrical signals by vibrating the tiny hairs attached to the nerves.
What is an organ system?
A group of organs that work together to do a job.
The largest organ in the body is _________
Skin
Explain how the eye adjusts for the amount of light. Be sure to use the correct names for the parts of the eye that are included.
The iris expands and contracts to adjust the amount of light entering the pupil.
Explain how sound travels through the ear.
The sound waves are funneled into the ear canal by the outer ear. They cause the eardrum to vibrate, and then those vibrations are passed on to the 3 tiny bones in the ear. Next, they go to the cochlea where they are transformed into electrical signals and passed to the brain.
Why is the integumentary system important
keeps out germs, hair protects from sun, hair keeps you warm, sweat keeps you cool.
The 4 types of tissue
Nerve, muscle, connective, and epithelial
Explain how the light travels.
Light enters through the pupil, passes through the lens, hits the retina in the back of the eye. The retina sends the signal along the nerve pathways to the brain.
Hammer, Anvil, Stirrup
What are the three parts of the integumentary system?
skin, hair, nails