the process by which oxygen released into the atmosphere by photosynthetic organisms is taken up by aerobic organisms while the carbon dioxide released as a by-product of repiration is taken up for photosynthesis.
Zoom Through “Spin Class” With These 10 Cycling TermsCycling no doubt courses throughout our life and culture, but so does the language of the sport and activity. So, strap on your helmets: we're going to spin through some of the zippiest terms in cycling, past and present.
Origin of oxygen cycle
First recorded in 1930–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019