respiratory center vs medulla oblongata

respiratory center and medulla oblongata both are nouns.

Word	Noun	Adjective	Verb	Adverb
respiratory center	Yes	No	No	No
medulla oblongata	Yes	No	No	No

respiratory center (noun)	medulla oblongata (noun)
the center in the medulla oblongata and pons that integrates sensory information about the level of oxygen and carbon dioxide in the blood and determines the signals to be sent to the respiratory muscles	lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata)