9.sensory organ,

전체 글

(1)

9.sensory organ,

integument system

* 특수 감각

1. eye : visual sense

( eye ball, accessary organ, refracting media, visual pathway )

(1)eye ball :2.5cm

․ fibrous coat : 후방 5/6 sclera, 전방 1/6 cornea

이행부위: corneoscleral junction → canal of Schlemm

․ vascular coat ( uvea ) :

choroid - sclera 내면→ melanin 색소

(2)

ciliary body - ciliary process, ciliary zonule(lens 고정) iris – melanin, pupil

․ sensory coat( retina ) :

blind portion ( visual cell 없음 )-모양체,홍채의 내면 optic portion ( visul cell 있음 )-맥락막의 내면

macula lutea - fovea centralis (visual acuity 예민) optic disc or optic papilla ( blind spot )

(3)

2) accessory organ:

․ eye muscle : rectal(4), oblique(2)

․ eye lid

*upper, lower:

eye lash

내측 - lacrimal papilla → lacrimal point

*tarsal plate:

tarsal gland or Meibomian gland- hordeolum

(4)

․ conjunctiva

palpebral conjunctiva bulbar conjuntiva

→ 이행부위 : sup, inf conjunctival fornix․ . lacrimal apparatus : gland, duct

lacrimal gland →lacrimal point → sup, inf lacrimal

duct→lacrimal sac → nasolacrimal duct → inf. meatus

(5)

3) refracting media:

․ cornea

․ aqueous humor : ciliary process

post chamber → pupil → ant chamber→ Fontana's space →canal of Schlemm → vein :장애 – glaucoma

․ lens : 혼탁 – cataract

․ vitreous body : lens 후방 ↔ 망막

(6)

4) visual pathway

․ optic disc

→ optic nerve

→ optic foramen

→ optic chiasma

→ optic tract

→ lateral geniculate body of thalamus

→ optic radiation

→ visual center of cerebral cortex

(7)

2. ear: hearing, equilibrium sense 1)external ear:

auricle, helix, earlobe

external auditory canal: cerumen 2)middle ear:

․ auditory tube(Eustachian tube)

․ tympanic membrane

․ tympanic cavity-auditory ossicles(malleus, incus, stapes) TM→manubrium of malleus→incus→base of stapes

→ 후상방:vestibular or oval window 후하방:cochlear or round window

→inner ear

(8)

3)inner ear or labyrinth

․ 골미로 :

chochlear - vestibule - semicircular canal perilymph

․ 막미로 :

chochlear duct-utricle & saccule - mem semicircular canal endolymph

(9)

4)equilibrim-hearing pathway

* 평형각:

․ 체위변화, 두부 회전 운동시 내림프

→5개의 감각 상피부 (구형난반, 난형난반 , 반규관 의 3개의 팽대부 )

→전정신경

→ 뇌간의 반사중추

․ 구형난반,난형난반:

정적평형-지구 인력에 대한 체위나 자세

․ 반규관의 3개의 팽대능:

동적평형-두부의 운동방향과 가속

(10)

* 청각:

․공기전도

→ 전정창

→ 전정계의 외림프

→ 와우관의 내림프 , 고실계의 외림프

→ 콜티나선기 or 와우창의 진동

→ 와우신경

→ 대뇌피질의 청각 중추

․ 골전도

(11)

3.nose: smell sense

․ 비강상부의 olfactory region

olfactory epithelium(olfactory, surporting cell)

․olfactory cell:

표면-olfactory hairs

기저부-olfactory fiber→ olfactory nerve

→cribriform plate의 foramen of ethmoid bone

→ olfactory bulb→ olfactory tract

→대뇌피질의 후각중추

․supporting cell

(12)

4.tongue: taste sense

․ taste buds

․ taste cell:

표면-taste hairs

기저부-전방 2/3:고삭신경( of facial nerve)

→solitary tract

후방 1/3:glossopharyngeal nerve

→고속핵

→thalamus

→대뇌피질의 미각중추

․ supporting cell

(13)

* 일반감각

common integument:

1. skin

2. appendages of skin:

hairs nails

cutaneous glands mammary glands

(14)

1.skin:

1)epidermis

horneys layer

clear or lucid layer granular layer

germinative layer(spinous & basal) 2)dermis

papillary layer

reticular layer-Langer line 3)subcutaneous tissue

(15)

2.appendages of skin 1)hairs

shaft follicle bulb 2)nails

bed root body lunula

(16)

3)cutaneous glands

․ sebaceous gl

․ sweat gl:

body, duct, pore small or eccrine gl large or apocrine gl

․ mammary gl:

nipple

(lactiferous lobe→lactiferous duct→lactiferous pore) areola

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