Well if you're referring to the human body, our cells make up a lot of everything we're made of. Muscles, organs, bones, blood, skin, etc. Biologically speaking, there's a lot to the human body besides organs. Sorry if this isn't very helpful.
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While individual sports promote a higher amount of discipline, research has indicated that people find team sports more enjoyable. ... Additionally in individual sport, the ability to rely on yourself and a discipline to keep yourself accountable are critical for success.