Sensory organs. Visual Organ
Sensory organs. Visual Organ
Sensoryorgans Receptors:receivethestimulationfromtheexternal orinternalenvironmentofthebodyand convertit into nerve impulseAccessoryorgans
① Receptors: receive the stimulation from the external or internal environment of the body and convert it into nerve impulse. ② Accessory organs Sensory organs
Classificationofthereceptors:·Exteroceptors---intheskin,mucous,visual &auditoryorgansfeel touch,temperature,pain,lightand soundInteroceptors----inviscera,heart,bloodvesselsacceptthephysicalandchemical stimulation.Proprioceptors--inthemuscles,tendons,joints,ligaments&internalearsmonitortheposition&movementofthelimbsandtrunkOROELaaok
Classification of the receptors: • Exteroceptors- in the skin, mucous, visual & auditory organs. feel touch, temperature, pain, light and sound. • Interoceptors- in viscera, heart, blood vessels. accept the physical and chemical stimulation. • Proprioceptors- in the muscles, tendons, joints, ligaments & internal ears. monitor the position & movement of the limbs and trunk
Visual organWall:Fibrous tunic,vasculartunic,retinaEyeballContents:aqueoushumor,lens,vitreousbodyAccessoryorgans:eyelid,conjunctiva,lacrimalapparatus,extraocularM·Receivethestimulationoflight.Transformthestimulationintonerve impulse
• Receive the stimulation of light • Transform the stimulation into nerve impulse Accessory organs: eyelid, conjunctiva, lacrimal apparatus, extraocular M. Eyeball Wall：Fibrous tunic, vascular tunic, retina Contents: aqueous humor, lens, vitreous body Visual organ
Section 1 EyeballWallofeyeball1.External/fibroustunic2.Middle/vasculartunic3.Innertunic/retinaOpticN
Ⅰ. Wall of eyeball 3.Inner tunic / retina 1.External / fibrous tunic 2.Middle / vascular tunic Section 1 Eyeball Optic N