BIO 102 Lecture Notes - Lecture 31: Grayscale, Olfactory Bulb, Depth Perception
Document Summary
The human ear: for sound detection and balance/being aware of body position (process to conduct the sound waves) Pinna: the earflap, cartilage covered by skin to collect sound waves. Bones: malleus (hammer), incus (anvil), stapes (stirrup) Tympanic membrane: eardrum, responds to sound waves. Oval window: deformable, forms inward to different vibrations, sets in fluid for the cochlea. Round window: pressure release valve, bows in and out with the oval window. Auditory tube (eustachian tube): equalize pressure across eardrum. If you"re sick, this is what is getting affected. This travels to the pharynx, where communicates outer pressure to mouth. Semicircular canals: 3 fluid filled right angles to one another- motion not just position. Calcium carbonate stones: when we tilt our head, these stones slide around and stimulate hair cells. Hair cells bend to tell us if our head is tilted all the way. Ampullae: dilated region at base of canals. Cochlea: structure where senses are for hearing, fluid filled.
