@The Anointed,
Crucifixion resulted in death through anyone of two ways. one way was hypovolemic shock, which can cause fluid to gather in the area around the heart. This is called pericardial effusion.
Another way that death would occur during crucifixion was due to asphyxiation, which occurs when the person is unable to breathe in enough oxygen to survive.
The victim’s weight was inhibiting him to breath and he had to keep pulling himself up with his hands which were nailed to the wooden beam, or pushing up with his feet which were also nailed to the stake.
Eventually, he would no longer be able to push up and due to the lack of Oxygen would pass out and die.
Because the Jewish authorities wanted the three who were crucified removed from their stakes before sunset, Roman guards were sent to make sure they were dead. Jesus was unconscious when the Roman soldier came to check. The other two who were crucified with Jesus, were still trying to push themselves up in their attempt to breath, so their legs were broken, and being no longer able to breath they died within minutes, but the guard believing that Jesus was dead, didn’t bother to break his legs, but instead, shoved a spear into his side, most likely under his ribs, which ruptured the pericardial sack, releasing the water with the blood that was still flowing through his body.
John the beloved disciple was still there and later recorded and emphasised the fact that both blood and water flowed from the body of Jesus: Could the Roman soldier have actually saved the life of Jesus by releasing the water around his heart? Shortly after that, Joseph and Nicodemus took the body down and buried it in the cave Just as the sun was setting on Wednesday afternoon.