1. Sense organs 1.角膜 (cornea) (NO.47)
2.眼球后壁(Posterior part of the eye)(NO.48)
3.内耳(Internal ear)(NO.49)
4.Quiz 3 周俊

2. 眼球（Eyeball） 眼球壁3层（外 内）： 角膜 巩膜 虹膜基质 睫状体基质 脉络膜 视部 锯齿缘 盲部：虹膜睫状体上皮
眼球壁3层（外 内）：
Fibrous tunica
纤维膜 角膜 巩膜
Vascular tunica
血管膜
虹膜基质
睫状体基质
脉络膜 视部
锯齿缘
盲部：虹膜睫状体上皮
Retina
视网膜

3. 角膜(Cornea) ：5层 Corneal epithelium Anterior limiting lamina
Corneal stroma
posterior limiting lamina
Corneal endothelium

5. Retina Two regions: The nonphotosensitive region (nonvisual part)
Located anterior to the ora serrata, no photoreceptors.
The photosensitive region (optic part)
Lines the inner surface of the eye posterior to the ora serrata (except the optic papilla)

6. Retina 4 layers of cells: Pigment cells Optic cells Bipolar cells
Ganglion cells

7. Central fovea
Papilla of optic nerve

8. Choroids and retina 10Internal limiting membrance
9Layer of nerve fibers
8Ganglion cell layer
7Inner plexiform layer
6Inner nuclear layer
5Outer plexiform layer
4Outer nuclear layer
3External limiting membrance
2Layer of rods and cones
1Pigment epithelium

9. (auricle) External ear ： auricle Middle ear： Mastoid process
external acoustic meatus
tympanic membrane (eardrum)
Middle ear：
tympanic cavity
auditory tube
mastoid process

10. Internal ear Bony labyrinth
Membranous labyrinth
Bony labyrinth：
Semicircular canals
Vestibule
Cochlea
Menbranous labyrinth：
Cochlear labyrinth
Vestibular labyrinth
three semicircular ducts
Utricle and saccule

11. Note：
The position of cochlear duct within the bony cochlea
The scala vestibuli and the scala tympani, containing perilymph
The scala media containing endolymph

12. Schematic diagram of the cochlea:
The scala media is the triangle space with its acute angle attached to the modiolus.Both the scala vestibuli and the scala tympani are filled with perilymph, whereas the cochlear cduct is filled with endolymph.The spiral organ of Corti rests on the lower wall of the scala media.
The scala vestibuli and the scala tympani are perilymph-containing spaces that communicate with each other at the apex of the cochlea through a small channel.
Scala vestibuli
Scala tympani

13. Slide49：内耳（Internal ear）
Cochlea

14. Vestibuli membrane
Scala vestibuli
Cochlear duct
Scala media
Basilar membrane
Scala tympani

15. Stria vascularis
Tectorial membrane

16. 螺旋器（Spinal/Corti organ）
Hair cell
Pillar cell
Phalangeal cell

19. 示教：壶腹嵴（crista ampullaris）

20. 球囊斑（macula saculi）
椭圆囊斑（macula utriculi）
示教：位觉斑（macula）

21. THE END!