When Jesus rose from the dead, he was able to eat:

Luke 24:39 Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have.

 40 And when he had thus spoken, he shewed them his hands and his feet.

 41 And while they yet believed not for joy, and wondered, he said unto them, Have ye here any meat?

 42 And they gave him a piece of a broiled fish, and of an honeycomb.

 43 And he took it, and did eat before them.

So, when we are resurrected, we can eat as well?

However, will resurrected people need to eat, since they will not die again?

Will resurrected people still need to breathe, will they require oxygen?

If breathing is not required, would it yet still be possible, so that the vocal cords function as before?

Or will it be possible for resurrected people to speak without having to breathe first?

If resurrected people will not require to eat and to breathe, then will they not require blood?

At this time, our blood brings oxygen and nutrients to the parts of our body.

If this is not required, the blood would not be required.

Also, it seems that resurrected people do not have blood.

I Corinthians 15:50 Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption.

Yet Jesus rose with flesh and bones:

Luke 24:39 Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have.

That which was no longer there, in him, was his blood, since Jesus had already shed his blood for our sins.

So, will those with resurrected bodies, also not have blood?

If there will not be blood, and no need to eat and breathe, then would there still need to be a circulation system?

I know that some have taught that instead of blood, the resurrected body will circulate water.

However, would that even be necessary?

If someone in a resurrection body does eat, like Jesus did, it will be different then it was before they were resurrected.

Before they were resurrected, their body took in nutrition, but it put out waste.

The waste was corruption, from corruption.

But they will be raised incorruptible, with no need for the corruption of dung, which was no doubt a result of the fall of Adam.

Also, will there still be any requirement to sleep with resurrected bodies?

In the new Jerusalem, there will be no night there.

Will there be anyone sleeping in the New Jerusalem?

I was hoping that you could help me with some of these questions.