The Sensory Organs
The Sensory Organs
The Sensory organs Sensory organs include the receptors and accessory organs. The receptors may be divided into three kinds The exteroceptors外感受器: receive stimuli such as touch, temperature, pain, light and sound from the external environment The interoceptors内感受器 pick up information about internal environment The proprioceptors本体感受器 receive stimuli from muscles, tendons joints and ligaments
The Sensory Organs Sensory organs include the receptors and accessory organs. The receptors may be divided into three kinds: ◼ The exteroceptors 外感受器: receive stimuli such as touch, temperature, pain, light and sound from the external environment ◼ The interoceptors 内感受器: pick up information about internal environment ◼ The proprioceptors 本体感受器: receive stimuli from muscles, tendons, joints and ligaments
The Visual organ视器 Composition eyeball and accessory organs of eye Shape of eyeball Has anterior and posterior poles Equator赤道 an Imaginary line encircling the eyeball midway between anterior and posterior poles Axis of eyeball眼轴:alne joining the two poles Optic axis视轴: a line joining the center of the pupil to the fovea centralis
The Visual Organ 视器 Composition: eyeball and accessory organs of eye Shape of eyeball ◼ Has anterior and posterior poles ◼ Equator 赤道: an imaginary line encircling the eyeball, midway between anterior and posterior poles ◼ Axis of eyeball 眼轴: a line joining the two poles ◼ Optic axis 视轴: a line joining the center of the pupil to the fovea centralis
Walls of eyebal‖l Cornea角膜 Fibrous tunic of eyeball Sclera巩膜 ris虹膜 Vascular tunic of eyeball Cilliary body睫状 Choroid脉络膜 Pars iridica retinae Pars caeca retinae Retina视网膜 Pars ciliaris retinae Pars optica retinae
Walls of eyeball Fibrous tunic of eyeball Cornea 角膜 Sclera 巩膜 Vascular tunic of eyeball Iris 虹膜 Cilliary body 睫状 体Choroid 脉络膜 Retina 视网膜 Pars iridica retinae Pars ciliaris retinae Pars optica retinae Pars caeca retinae
Fibrous tunic of eyeball (outer) Cornea角膜: anterior1/6,a nonvascular transparent portion, richly supplied by nerves; because it is curved the cornea helps focus light Sclera巩膜( white of eye, opaque portion) a posterior 5/6, consisting of fibrous connective tissue that forms a tough protective covering for eyeball, a Contains sinus venosus sclerae巩膜静脉窦 which lies beneath the junction of cornea and sclera
Fibrous tunic of eyeball (outer) ◼ Cornea 角膜: anterior 1/6, a nonvascular, transparent portion, richly supplied by nerves; because it is curved, the cornea helps focus light ◼ Sclera 巩膜 (white of eye, opaque portion): ❑ posterior 5/6, consisting of fibrous connective tissue that forms a tough protective covering for eyeball, ❑ Contains sinus venosus sclerae 巩膜静脉窦which lies beneath the junction of cornea and sclera