If you have not buccal cavity you cannot eat and will starve.
Then a human would arrive at an asteroid.
The abdominal cavity
No reaction that require ones would be fast enough to keep the body alive.
The spinal cavity is involved in lumbar surgery.
depends on how long, heating at first, boiling, then if let go it would look like a hotdog
what would happen if lungs were in single large cavity
In the chest cavity
Then a human would arrive at an asteroid.
The abdominal cavity
There will be no human
Buccal is cheek - so lets see what would be there? Muscle, skin and salivary glands.
After 72 hours that human would be severely dehydrated if not dead.
The body would die.
he would freeze or sufficate.
Then there would be no human nature.
They would EXPLODE
we would die