the branch of medical technology that seeks to create replacement tissues or organs. Engineers often start with existing tissue, such as bone or skin. Now, new tissue can also often be generated from stem cells, which are special growth and repair cells that can be found in embryos, blood, fat, and marrow.
Both Kyla and Tia will be in their zone. Even if they dicrease their heart rates by 20 beats per minute from 175 beats per minute. 155 beats per minute still falls under kyla's target heart rate zone and Tia's target heart rate zone.
