The phrase "human heart" refers to both the physical organ inside our bodies that pumps blood and keeps us alive, as well as the metaphorical symbol that represents our feelings, emotions, and compassion towards others. Full definition
You can learn about the structure and functions of human heart along with various factors affecting the normal functioning of the heart. (elearningindustry.com)
He hopes that very soon there will be articles about AI creating human hearts for robotic characters. (dualshockers.com)