This article needs to be updated. The reason given is: no files for 2006 are listed at the cited source, but files for 2013 are there; NLM releases this information annually. Please help update this article to reflect recent events or newly available information. (February 2020)

The following is a partial list of the "A" codes for Medical Subject Headings (MeSH), as defined by the United States National Library of Medicine (NLM).

This list continues the information at List of MeSH codes (A08). Codes following these are found at List of MeSH codes (A10). For other MeSH codes, see List of MeSH codes.

The source for this content is the set of 2006 MeSH Trees from the NLM.

MeSH  A09 – sense organs

MeSH  A09.246 – ear

MeSH  A09.246.272 – ear, external

• MeSH  A09.246.272.396 – ear canal
• MeSH  A09.246.272.405 – ear cartilages
• MeSH  A09.246.272.702 – tympanic membrane

MeSH  A09.246.397 – ear, middle

• MeSH  A09.246.397.247 – ear ossicles
• MeSH  A09.246.397.247.362 – incus
• MeSH  A09.246.397.247.524 – malleus
• MeSH  A09.246.397.247.806 – stapes
• MeSH  A09.246.397.369 – eustachian tube
• MeSH  A09.246.397.400 – glomus tympanicum
• MeSH  A09.246.397.727 – stapedius
• MeSH  A09.246.397.749 – tensor tympani

MeSH  A09.246.631 – ear, inner

• MeSH  A09.246.631.246 – cochlea
• MeSH  A09.246.631.246.125 – basilar membrane
• MeSH  A09.246.631.246.280 – cochlear aqueduct
• MeSH  A09.246.631.246.292 – cochlear duct
• MeSH  A09.246.631.246.292.876 – stria vascularis
• MeSH  A09.246.631.246.292.906 – tectorial membrane
• MeSH  A09.246.631.246.577 – organ of corti
• MeSH  A09.246.631.246.577.325 – hair cells
• MeSH  A09.246.631.246.577.325.315 – hair cells, inner
• MeSH  A09.246.631.246.577.325.380 – hair cells, outer
• MeSH  A09.246.631.246.577.543 – labyrinth supporting cells
• MeSH  A09.246.631.246.814 – round window
• MeSH  A09.246.631.246.848 – scala tympani
• MeSH  A09.246.631.246.900 – spiral ganglion
• MeSH  A09.246.631.246.930 – spiral lamina
• MeSH  A09.246.631.663 – semicircular canals
• MeSH  A09.246.631.663.350 – hair cells, vestibular
• MeSH  A09.246.631.909 – vestibule of the ear
• MeSH  A09.246.631.909.551 – oval window
• MeSH  A09.246.631.909.625 – saccule and utricle
• MeSH  A09.246.631.909.625.125 – acoustic maculae
• MeSH  A09.246.631.909.625.125.340 – hair cells, vestibular
• MeSH  A09.246.631.909.625.125.680 – otolithic membrane
• MeSH  A09.246.631.909.957 – vestibular aqueduct
• MeSH  A09.246.631.909.957.360 – endolymphatic duct
• MeSH  A09.246.631.909.957.360.701 – endolymphatic sac

MeSH  A09.371 – eye

MeSH  A09.371.060 – anterior eye segment

• MeSH  A09.371.060.067 – anterior chamber
• MeSH  A09.371.060.067.070 – aqueous humor
• MeSH  A09.371.060.067.318 – endothelium, corneal
• MeSH  A09.371.060.217 – cornea
• MeSH  A09.371.060.217.113 – bowman membrane
• MeSH  A09.371.060.217.228 – corneal stroma
• MeSH  A09.371.060.217.271 – descemet membrane
• MeSH  A09.371.060.217.318 – endothelium, corneal
• MeSH  A09.371.060.217.325 – epithelium, corneal
• MeSH  A09.371.060.217.659 – limbus corneae
• MeSH  A09.371.060.932 – trabecular meshwork

MeSH  A09.371.192 – conjunctiva

MeSH  A09.371.337 – eyelids

• MeSH  A09.371.337.338 – eyelashes
• MeSH  A09.371.337.614 – meibomian glands

MeSH  A09.371.463 – lacrimal apparatus

• MeSH  A09.371.463.640 – nasolacrimal duct

MeSH  A09.371.509 – lens, crystalline

• MeSH  A09.371.509.155 – lens capsule, crystalline
• MeSH  A09.371.509.225 – lens cortex, crystalline
• MeSH  A09.371.509.670 – lens nucleus, crystalline

MeSH  A09.371.613 – oculomotor muscles

MeSH  A09.371.670 – pigment epithelium of eye

MeSH  A09.371.729 – retina

• MeSH  A09.371.729.050 – amacrine cells
• MeSH  A09.371.729.055 – blood-retinal barrier
• MeSH  A09.371.729.313 – fundus oculi
• MeSH  A09.371.729.522 – macula lutea
• MeSH  A09.371.729.522.436 – fovea centralis
• MeSH  A09.371.729.690 – optic disk
• MeSH  A09.371.729.727 – photoreceptors
• MeSH  A09.371.729.727.660 – photoreceptors, invertebrate
• MeSH  A09.371.729.727.670 – photoreceptors, vertebrate
• MeSH  A09.371.729.727.670.100 – rods
• MeSH  A09.371.729.727.670.650 – cones
• MeSH  A09.371.729.727.670.650.650 – rod outer segments
• MeSH  A09.371.729.760 – retinal bipolar cells
• MeSH  A09.371.729.765 – retinal ganglion cells
• MeSH  A09.371.729.775 – retinal horizontal cells

MeSH  A09.371.784 – sclera

MeSH  A09.371.894 – uvea

• MeSH  A09.371.894.030 – blood-aqueous barrier
• MeSH  A09.371.894.223 – choroid
• MeSH  A09.371.894.223.250 – bruch membrane
• MeSH  A09.371.894.280 – ciliary body
• MeSH  A09.371.894.513 – iris
• MeSH  A09.371.894.513.780 – pupil

MeSH  A09.371.943 – vitreous body

MeSH  A09.531 – nose

MeSH  A09.531.623 – olfactory mucosa

• MeSH  A09.531.623.580 – olfactory receptor neurons

MeSH  A09.531.940 – vomeronasal organ

MeSH  A09.846 – taste buds

The list continues at List of MeSH codes (A10).