No. Its a piece of an organism : you.
bicept
The reason the contract and relax is because they move you arms up and down. When you straighten your arm, the bicept relaxes and the tricept contracts. When you pull your arm up ( flex ) the bicept contracts and the triceps relaxes. By the way, I'm 11!
The antagonist to the Triceps are the biceps-brachii
human
the people
it is bread
It depends on what kind of disease it is.
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The detrimental use of one organsim by another.
an eurypterid
The detrimental use of one organsim by another.
a heterotroph or consumer