Essential questions What are the structures of the sensory system? 3.03 Remember the structures of the sensory system 2
The Senses Eyes Sight Ears Hearing Nose Smell Tongue Taste Skin Touch 3.03 Remember the structures of the sensory system 3
Eyes 3.03 Remember the structures of the sensory system 4
Structures of the eyes External structures Orbit Eyelids Eyelashes Conjunctiva Lacrimal apparatus Extrinsic muscles 3.03 Remember the structures of the sensory system 5
Structures of the eyes Sclera: the white of the eye Cornea: The window of the eye Choroid coat: the middle layer of the eye Pupil: The circular black opening of the eye Iris: The colored layer of the eye Lens: The crystalline structure located behind the iris and pupil Aqueous humor: Watery fluid inside the anterior chamber of the eye Vitreous humor: Jelly like substance located in the posterior chamber of the eye Retina: the third layer of the eye Rods: Cells of the eye that are sensitive to dim light Cones: Cells of the eye that are sensitive to bright light and color Optic disc: Nerve fibers from the retinal gather here to form the nerve. Blind spot 3.03 Remember the structures of the sensory system 6
Structures of eyes Extrinsic muscles: eye muscles located attached to the sclera Superior rectus Inferior rectus Lateral rectus Medial rectus Superior oblique Inferior oblique 3.03 Remember the structures of the sensory system 7
Eyes Internal structures 3.03 Remember the structures of the sensory system 8
Eye Trivia Which famous screen actress was noted for her stunning eyes? Many people thought her irises were violet in color 3.03 Remember the structures of the sensory system 9
Structures of the eyes Internal structures 3.03 Remember the structures of the sensory system 10
Structures of the eyes Rods and cones Rods Active in dim light Do not perceive color Cones Active in bright light Perceive color 3.03 Remember the structures of the sensory system 11
Eyes Name the structures Review 3.03 Remember the structures of the sensory system 12
Ears 3.03 Remember the structures of the sensory system 13
Structures of the ears External ear Middle ear- Also known as the tympanic cavity Inner ear- Also known as the labyrinth. 3.03 Remember the structures of the sensory system 14
Structures of the ears External ear Pinna- the outer ear. Collects sound waves Auditory canal or external auditory meatus Ceruminous glands- Produce ear wax Tympanic membrane- the eardrum. Separates the outer and middle ear 3.03 Remember the structures of the sensory system 15
Structures of the ears Middle ear Ossicles Hammer or malleus Anvil or incus Stirrup or stapes Eustachian tube- Connects the ear cavity with the pharynx 3.03 Remember the structures of the sensory system 16
Structures of the ears Inner ear Cochlea Special spiral shaped organ of hearing Semicircular canals Contain a liquid and delicate hair like cells that bend when the liquid is set in motion by the head or body movements Vestibule chamberhouses the inner ear 3.03 Remember the structures of the sensory system 17
Ears Name the structures Review 3.03 Remember the structures of the sensory system 18
Nose 3.03 Remember the structures of the sensory system 19
Structures of the nose Nares Nasal cilia Nasal septum Olfactory receptors Turbinates 3.03 Remember the structures of the sensory system 20
Structures of the nose 3.03 Remember the structures of the sensory system 21
Structures of the nose Olfactory area 3.03 Remember the structures of the sensory system 22
Structures of the nose 3.03 Remember the structures of the sensory system 23
Tongue 3.03 Remember the structures of the sensory system 24
Structures of the tongue 3.03 Remember the structures of the sensory system 25
Structures of the tongue Taste receptors Also known as gustatory buds or taste buds 3.03 Remember the structures of the sensory system 26
Trivia Tongue Did you know Taste is the weakest of the five senses We have almost 10,000 taste buds inside our mouths; even on the roofs of our mouths Everyone s tongue print is different similar to fingerprints 3.03 Remember the structures of the sensory system 27
Skin 3.03 Remember the structures of the sensory system 28
Structures of the skin Epidermis layer Dermis layer Subcutaneous layer Touch receptors Tactile corpuscles located in the skin Temperature sensors Pain receptors 3.03 Remember the structures of the sensory system 29
Structures of the sensory system Did you know.. Our eyes are always the same size from birth, but our nose and ears never stop growing! 3.03 Remember the structures of the sensory system 30
Essential questions What are the structures of the sensory system? The End 3.03 Remember the structures of the sensory system 31