eight parts of ayurveda

eight disciplines are generally called "Ashtanga Ayurveda" and are :-

Internal Medicine(Kaya Chikitsa)

Paediatrics(Kaumar Bhritya)
Psychiatry( Bhoot Vidya)
Otorhinolaryngology and Ophthalmology(Shalakya)
Surgery( Shalya)
Toxicology( Agad Tantra)
Geriatrics(Rasayana)
Eugenics and aphrodisiacs(Vajikarana)