General senses

Smell (Olfaction) (4)

-Olfactory receptors in nasal cavity

-Chemoreceptors detect airborne molecules

-Signals sent to olfactory bulb and brain

-Closely linked to memory and emotion

Taste (Gustation) (4)

-Papillae (taste buds on tongue)

-Detects sweet, sour, salty, bitter umami

-Chemoreceptors (stimulated by dissolved chemicals)

-Cranial nerves: Facial (VII), glossopharyngeal (IX), vagus (X)

Eye structure (6)

-Sclera (white protective outer layer)

-Cornea (transparent front part)

-Iris (colored part, controls pupil size)

-Lens (Focuses light)

-Retina (Contains photoreceptors)

-Ciliary body (Produces nutricionous aqueous fluid to the eye)

Photoreceptors (4)

Rods: Dims light, black, and white

Cones: Bright light, color

Optic nerve: Transmits signals to brain

Fovea: Area of sharpest vision

Ear anatomy/hearing 

Outer ear: Auricle, auditory canal

Middle ear: Tympanic membrane, ossicles (malleus, incus, stapes)

Inner ear: Cochlea (hearing), semicircular canals (balance)

Hearing mechanisms (4)

-Sound waves vibrates tympanic membrane

-Ossicles amplify vibration to Cochlea

-Hair cells in cochlea convert vibration to electrical signals

-Auditory nerve to brain