The computer made it clear that Tuck not enter the heart but I'm still not clear on if it would harm Jack or Tuck?
Logically I would say it was a danger to Tuck but I'm not sure.
"Mr. Treehorn treats objects like women, man."
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I did think of that but assumed that, considering that Tuck can track where he was in Jack's body, the computer would warn him that he was headed there so that Tuck could then divert.
shareThe computer said that cardiac arrest was imminent if he entered the valve. This may be because of a possible pressurization within the heart and where the heart would take the pod to. Some blood vessels are indeed as small as single blood cells; like a 1 lane highway for example. These surround the lining of the heart for muscular oxygenation. Too many dangers for the pod and jack. Also being inside the heart while its pumping fast would jostle the pod around incredibly hard.
shareI had completely forgot about that line of dialogue from the computer, it pretty much makes the answer clear that the danger was to both of them.
"Mr. Treehorn treats objects like women, man."
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It was a definite danger to Tuck, not sure how it could harm Jack.
The heart is a 4-chamber pump that pulls blood from the lungs and pushes more back and pulls blood from the body and pushes more back., two atriums that receive blood from the lungs and the body and two ventricles that send blood towards the lungs and the body, the pressure inside your heart is phenomenal, with one beat it can send several litres of blood rushing through your arteries into every millimetre of your skin and other organs. The craziest pressure is inside the superior ventricle which pulses blood out towards the body, if Tuck was in there he would experience immense pressure and his pod would be crushed.
I suppose the danger to Jack, not so much a stroke seeing as you could end up anywhere other than the brain, you could end up in a finger or a kidney, would probably be something to do with the pod's electro-magnetic field, the heart uses tiny electrical currents to regulate it's speed, frequency and calibration, it takes as little as an electric shock of .4 of an amp to kill someone, and that is with all of the resistance given by a person's skin, flesh and blood. Inside the actual heart you could probably cause fibrillation (out-of-sync pumping of one of the 4 chambers) with the most miniscule of electrical current.
Tuck's pod would effectively become a pacemaker, but instead of sending 4 tiny signals in the correct sequence and timing it would send a jumble of electrical 'nonsense' and Jack would go into cardiac arrest.
Opinions are just onions with pi in them.
It was the tricuspid valve. That means the pod was already in the right atrium, about to enter the right ventricle. Jack was scared to death and his heart was beating like crazy, which was why the computer said "cardiovascular threshold exceeded, cardiac arrest imminent." It wouldn't have hurt Jack, but going in would have tossed the pod around like a leaf in a hurricane. If being injected into Jack's butt was enough to knock Tuck unconscious, the turbulence inside the ventricle would have been like a plane crash.
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