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Sense Organs

Chapter 11 Anatomy & Physiology

these receptors react to various chemicals, including odors and tastes, as well as the concentration of various chemicals in the body Chemoreceptors
these receptors respond to factors such as pressure, stretch, or vibration, that change the position of the receptor. Mechanoreceptors
these receptors are activated by change in the temperature Thermoreceptors
these are pain receptors that respond to tissue damage from trauma as well as form heat, chemicals, pressure, or lack of oxygen Nociceptors
found in only the eyes, these receptors respond to light Photoreceptors
abundant in the skin and mucous membranes, these fibers produce a sharp, localized, stabbing-type pain at the time of injury Fast pain fibers
these fibers are congregated on deep body organs and structures and produce a dull, aching pain. Slow pain fibers
the since of taste is called Gustation
taste buds are located in the protrusions on the tongue called Papillae
these are large papillae found at the rear of the tongue Vallate Papillae
these form ridges at the sides of the tongue Foliate Papillae
these are thread-like papillae that contain no taste buds Filiform Papillae
these are especially concentrated at the tip of the tongue Funfiform Papillae
a pair of structures that are residing just underneath the brain's frontal lobe Olfactory Bulbs
the since of smell is called Olfaction
the visible part of the ear is called Auricle (pinna)
this part of the ear leads through the temporal bone to the eardrum Auditory Canal
the opening of the auditory canal to the outside of the body is called External Acoustic Meatus
the three small bones in the ear are called Auditory Ossicles
the bone in the ear that is shaped like a hammer is called Malleus
the bone in the ear that is shaped like an anvil is called Incus
the bone in the ear that is shaped like a stirrup is called Stapes
the eardrum is called the Tympanic membrane
this is a passageway from the middle ear to the nasopharynx Auditory/ Eustachian tube
these structures are curial for the maintenance of equilibrium and balance Semicircular canals
this structure, which marks the entrance to the labyrinths, contains organs necessary for the sense of balance Vestibule
this snail like structure contains the structures for hearing Cochlea
the triangular duct that is filled with endolymph is called Cochlea duct
the fluid that cushions the space between the two labyrinths is called Perilymph
a fluid that occupies the inside of the membranous labyrinth is called Endolymph
this lines the inside of the bony labyrinth Membranous labyrinth
thousand of hair like cells project from the epithelial layer and are topped with a gelatin like membrane called Tectorial membrane
at the end of each canal is a bulb like area called an Ampulla
the hair part of the face, that helps shield eye from glare.. (hint girls color this in with make up ... sometimes alil to much) Eyebrows
these are form primarily the orbicularis oculi muscle covered in skin, it protects the eye from foreign bodies and block light when closed Eyelids
the opening between the lids is called Palpebral fissure
the hairs on the eyelids that help keep debris out of eye are called Eyelashes
the transparent membrane that lines the inner surface of the eyelid and covers the anterior surface of the eyeball is called Conjunctiva
these glands lie along the thickened area at the edge of the eye Tarsal plate
this small gland secretes tears that flow onto the surface of the conjunctiva Lacrimal gland
this passageway carries tears into the nasal cavity Nasolacrimal duct
this is a tiny pore through which tears drain into the lacrimal canal and the nasolacrimal duct Lacrimal Punctum
the study of the eye and the treatment of its diseases is called Ophthalmology
form from dense connective tissue this is the outermost layer of the eye Sclera
the thin layer of the light sensitive cells in the eye is called Retina
exiting from the posterior portion of the eyeball is the ________, which also transmits signals to the brain Optic nerve
this is a ring of colored muscle in the eye The Iris
the thickened extension of the choroid that forms a collar around the lens is called the Ciliary body
the highly vascular tissue that supplies oxygen and nutrient to the retina and sclera is called the Choroid
the center point of the retina is a patch of cells called the Macula Lutea
inside the macula lutea is a depression called the Fovea centralis
medial to the macula lutea is the Optic disc
the space between the lens and the cornea is the Anterior cavity
the cleat watery fluid that fills the anterior cavity is called Aqueous humor
the transparent disc of tissue just behind the pupil, between the anterior and posterior cavities is called the lens
the larger cavity that lies posterior to the lens is called the Posterior cavity
the posterior cavity is filled with a jelly like substance called Vitreous humor
bending light rays is called Refraction
this lines up the visual axis of each eye toward the object so that the light rays fall on the corresponding spots on each retina Convergence
the sharpness of visual perception is called Visual acuity
this muscle encircles the pupil Pupillary constrictor
when you eyes let in light to see your pupil become more open this is called Pupillary dilator
the curvature of the lens changes to allow the eye to focus on a near object is called Accommodation
these active in dim light Rods
these are activated in bright light Cones
Created by: Leci81



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