Often medical terms are a combination of prefixes, root words, and suffixes. However, the term eustachian tube is named after it's discoverer -- Bartolomeo Eustachia (d.1574).
Cerebro- is the medical terminology combining form meaning cerebral.
Metatars- is the medical terminology combining form meaning metatarsal.
Hepat/o is the medical terminology combining form meaning liver.
The medical terminology combining form meaning work is "ergo-".
Hypno- or somno- is the medical terminology combining form meaning sleep
The medical terminology combining form meaning hands is mano-
Pancreo- is the medical terminology combining form meaning pancreas.
Cerebro- is the medical terminology combining form meaning cerebral.
Oligo- is the medical terminology combining form meaning scanty.
Scapul/o is the medical terminology combining for meaning scapula.
Metatars- is the medical terminology combining form meaning metatarsal.
Hepat/o is the medical terminology combining form meaning liver.
Thyro- is the medical terminology combining form meaning thyroid.
Aort- is the medical terminology combining form meaning aorta.
"Levo-" is the medical terminology combining form meaning "left."
Chole- is the medical terminology combining form meaning gall.
-centesis is the medical terminology combining form meaning puncture.