wow_its_science

Wow, thank you for all the amazing answers here! Totally helped me clear my doubts

I have a question - is there a vacuum anywhere inside the human body? Of course, the spaces between cells are filled with interstitial fluid, but what about hollow organs, like for example stomach, bladder, bowels, uterus?

Hey Everyone, So I'm currently and IB student taking IB Sports, Exercise, and Health Sci. We're currently in our Cardiorespiratory Physiology Unit and I have a question (more like an odd thought that came into my head while listening to my teacher) : So, the heart pumps blood, and the left ventricle sends blood to your systemic circulation while the right ventricle sends blood to your pulmonary circulation. And obviously, the heart has its own cardiac blood supply to enrich its tissues aside from that, but does anyone know if Carbon dioxide or Oxygen diffuse into cardiac tissue when the heart pumps blood? is that possible? Again, it's just a weird thought that popped into my head, but it's been nagging me for a while now. In addition, because pulmonary veins go to the lungs to re-enrich deoxygenated blood with oxygen, do the membranes around the lungs generally have a lower O2 concentration because of the continuous diffusion of CO2? (This is again branching off of whether diffusion can occur outside of capillaries ) Thanks!

Aha, good point! Thank you for reminding me. I was going to post an image of the type of potometer I was using but I didn't know if it would load. I'll add it in.

Hey Everyone, Do you have any tips and tricks on setting up potometers? Any advice is greatly appreciated. I'm conducting an investigation that necessitates the use of potometers so I'm hoping to gets some tips in before my final round of data collection. Thanks!