It is possible to do an experimentation to know that. Considering the human heart and the pig heart are similar. You can buy a fresh pig heart and measure the fragility with an hydraulic press: https://www.youtube.com/watch?v=SnFYYNqwznY. read more
Spiritually speaking a human has 7 major chakras. One of those chakras is known as the Heart chakra or Anahata. Our spiritual heart is located inside our heart chakra. read more