What problem can exist for humans using scuba equipment within philosophical marine?

Biology question from the chapter about gas exchange.
Answers:
The bends!

Formation of nouns bubbles in various tissues (particularly at the joint - cartilage I suppose)
resulting from rapid pressure change (i.e. if the diver surfaced too quickly) cause dissolved gas to undissolve, amalgamate and form gas pockets - bubbles.

Very painful in the joint, potentially life threatning if bubbles appear in the blood. May wreak heart attack.

I suppose you could also talk about the possibility of O2 running out, or tubes becoming blocked. Perhaps even the possibility of the equipment making you look more approaching shark-food; i.e. a seal.
U get drunk on nitrogen that builds up within your blood unless you're on tri-mix or some other gas. At depth oxygen is toxic to you.

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