外感受器分布在皮肤ppt.

Retina 视网膜
Pars iridica retinae
虹膜部
Pars caeca retinae盲部
Pars ciliaris retinae 睫状体部
Pars optica retinae 视部
Wall of eyeball
(1) Fibrous tunic 纤维膜 (outer layer)
Part Ⅳ来自百度文库
Sensory Organs
感觉器
The Sensory Organs
Sensory organs include
• receptors感受器
• accessory organs辅助装置.
The receptors may be divided into three kinds: • exteroceptors 外感受器:分布在皮肤、鼻腔和口腔粘膜、视器
和听器等处， receive stimuli such as touch, temperature, pain, light and sound from the external environment • interoceptors 内感受器:分布于内脏和心血管等处pick up information about internal environment • proprioceptors 本体感受器:分布在肌肉、肌腱、关节、韧带 和内耳平衡器等处receive stimuli from muscles, tendons, joints and ligaments
anterior pole posterior pole
Ⅱ.Structure of eyeball
1. Walls of eyeball
Fibrous tunic of eyeball
Vascular tunic of eyeball
Cornea 角膜
Sclera 巩膜 Iris 虹膜 Cilliary body 睫状体 Choroid 脉络膜
chapter 1 The Visual Organ 视器
The Visual Organ consist of eyeball 眼球 accessory organs
of eyeball 眼附属器
Section 1 Eyeball
Ⅰ. Shape of eyeball
anterior and posterior poles
Cornea 角膜:
anterior 1/6；
a nonvascular, transparenⅡt
portion； supplied richly by nerves;
because it is curved, the cornea helps focus light. 感觉神经丰富，故感觉敏锐。有屈光 作用
iridocorneal angle 虹膜角膜角 sphincter pupillae 瞳孔括约肌 dilator pupillae 瞳孔开大肌
eyeball
Ciliary body 睫状体: Behind the iris，may be divided into
a) ciliary ring 睫状环 b) ciliary processes 睫状突:
cornea
sclera
Wall of eyeball
(2) Vascular tunic 血管膜 (middle layer):
iris 虹膜
lies the anterior part of the vascular tunic, and is a thin contractile membrane with a central opening, the pupil 瞳孔
前、后极
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黄斑中央凹
Equator 赤道: an imaginary line encircling the eyeball, midway between anterior and posterior poles
sinus venous sclerae 巩膜静脉窦:
lies beneath the junction of cornea and sclera 角膜与巩膜交界处, and is irregular circular canal.
cribriform plate of sclera 巩膜筛板
Sinus venous sclerae
function： Nutrition 营养作用 Absorb the disperse light
吸收分散光作用。
Wall of eyeball
(3) Internal tunic of eyeball内膜— retina 视网膜
division: 以锯状缘ora serrata为界 a. Pars caeca retinae盲部 :
Walls of eyeball
(1) Fibrous tunic 纤维 膜
Sclera巩膜:
posterior 5/6, consists of fibrous
connective tissue having protection and surpporting for eyeball, posteriorly it contineus with the sheath of optic n.
60~80条, producing aqueous humor房水
ciliary muscle睫状肌 ciliary zonules 睫状小带
d) 作用：
调节晶状体的曲度
secrete the aqueous humor房水
ciliary zonules
eyeball
choroid 脉络膜
Thin, highly vascular in posterior 2/3 of eye Contains brown pigmented cells and dense capillary plexus