'Body' in the Bible

"'All the days that he separates himself to the Lord he must not contact a dead body.

And do this to them to purify them: Sprinkle water of purification on them; then have them shave all their body and wash their clothes, and so purify themselves.

It happened that some men who were ceremonially defiled by the dead body of a man could not keep the Passover on that day, so they came before Moses and before Aaron on that day.

And those men said to him, "We are ceremonially defiled by the dead body of a man; why are we kept back from offering the Lord's offering at its appointed time among the Israelites?"

"Tell the Israelites, 'If any of you or of your posterity become ceremonially defiled by touching a dead body, or are on a journey far away, then he may observe the Passover to the Lord.

And whoever touches the body of someone killed with a sword in the open fields, or the body of someone who died of natural causes, or a human bone, or a grave, will be unclean seven days.