Just out of college, I worked in a research lab that studied the nervous system. One time, someone died who donated their body to medical research. Our lab received the heart to harvest cells and grow in culture. That’s where they come from... We looked at the effects of medicines on the heart by puffing drugs being studied on to the cells and monitoring the Na/Ca channels in the heart via patch clamping.
How do you know whomever that person is was responsible for the cells used in this experiment?