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24. sense organs
 

24. sense organs

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    24. sense organs 24. sense organs Presentation Transcript

    • taste budscontain taste receptorsmostly found on raised protrusionsof tongues called papillae food salivacan taste sweet, salty, sour,bitter, or umami depending on thechemical stimulation
    • mucuscilia bulb olfactory nasal cavity nostrils membrane a space behind nose the liningof thethe holes of the nasal separated from the olfactory small hair-like projections on thein the middle of nose olfactory air through whichbone epithelium by a epithelium cavity mucus membrane the face enters mucus that produces connected to the smell connected to the smell capture small particles from receptorsneurons of the nose separated from the receptor nasal the air oral cavity olfactory contains the by the nose cavity Air allows molecules thatnerve coveredmouth nerves with mucus upper that transmit contain odorthe brain for messages to to dissolve connects to detectmolecules the nerves with the stimulated by odor nostrils upper mouth below the brain throat
    • mechanoreceptor Merkel’s disksMeissner’scorpusclesPaciniancorpuscles Ruffini corpuscles Thermoreceptors Nociceptors receptors tomost sensitive of all most receptors respond toskin sensitive that of of the sensory receptorsstretch skin the second skin all the pain sensitive the pressure mechanoreceptor changes in temperature thatskin mechanoreceptors the are stimulated mechanoreceptors by mechanical monitor objectand believed to pressure/distortion comes in two types: heat can detect distortionsallowing slippage on the skin, in the colddeeper withinreceptors lies receptor and skin rapidly-adapting thepressure include touchof 1 micrometer skin with size grip modulation of receptors temperature above heat receptor: detect mechanical changes body temperature sensory slowly-adapting receptors tissue rapidly-adapting can sense vibrations, texture, within joints, especially angle receptors and light touch changes touch and howbelow senses light temperature long cold receptor: an object has been touching the body temperature detect gross pressure changes may also sense heat skin and vibrations more cold than heat receptors
    • sclera iris cornea pupilanterior nerve ciliary chamber vitreous body optic muscle retina lens carries the nerve membrane found of changes the covering space between corneathe transparent shapeat the black the ofof the eye colored area of shape whiteiriseyethethe eye gives area the gathers area it eye light ciliary muscle messages back lens of and iris to of the the eyeball brain focusesaofalight-sensitive contains lens when change has muscles ,that on the tough theclearlight looking at made up thetransparent thickens material that contains jelly-like vitreous protectsclose up the iris an openingvitreous humor theiniris material calledeyeball something and cones) cells (rods body retina fluid its shape covers the worksfocus form to shape nourishes passesthat the helpsthe lensalight& from toughlight and keepsthe where like when looking thins material in rods–tell the movie letslens to thefarawayeye light enter the cones–tell the the healthy retina at something color projector eye covers the eyeball processes the light near and shrinks when light isimagebut enlarges when there ismessages anterior converts it to nerve little light chamber
    • hammer/malleus cochlear nerve ovalpinna earwindow eardrum ossicles cochlea canal the bone flap nerve can eardrum the auditory that thatbethe membrane-covered opening bones foundas the tympanic alsoear attachedcavity in seen a spiral-shapedextends from the tube thatin to the known the tympanic receivesof the the eardrum tectorial thethe cochleasides arefrom on theearnerve impulsesear frompinna to of which membranevibrations passed inner cavity face’s middle membrane the organ of corti receives sound outer earear to carries vibrations from the anvil/incus consist of the waves from separates the malleus from leads from the middle collects soundcarries theseand force the stirrupwavesdrum (hammer), to the (anvil), the the nerve that exerts on middleincus ear cochleaear pinna ovalstapeshammer (from which nervewindow bridgesimpulses to the brain the the (stirrup) vibrationsfluids which vibrate are passed) to the contains amplified vibrations receivessounds to (earwax) secretes cerumen the body transmitsstapes hits thefrom directs sound waves oval stirrup bones of smallest after the from aids stirrup ossicles in that the canal the the ear canal cleaning, auditory in to stirrup/stapes window receive of vibrations the formvibrations from lubrication, and protection containsvibrationsof corti causes the organ to occur the eardrum, increase the Pinna the bone attached to the anvil au- (the organ that contains from in theof these, and move to force vibrations are fluidsand cochlea’s passedsound to the cochleastirrup) ditory wavesreceptor cells) which these sensory (together with the the oval window’s membrane outer ear middle ear inner ear
    • Though I believe you were bored.