physiology
//ˌfɪz.iˈɒl.ə.dʒi//
Noun
physiologySingular
physiologiesPlural
1
The branch of biology that deals with the normal functions of living organisms and their parts.
She is studying human physiology at the university.
2
The way in which a living organism or bodily part functions.
The physiology of the heart changes as we age.