science Structure and Function of Heart The heart is a triangular-shaped, hollow, muscular organ. It is situated on the left side between the two lungs. It consists of special involuntary muscles. Sheikh Sajjad Hello,This is Sajjad from Bangladesh.I am working for human rights and development.Interested in travelling,gain knowledge and help people. More posts by Sheikh Sajjad. Sheikh Sajjad 19 Aug 2020 • 4 min read Subscribe to Utopia Educators Get the latest posts delivered right to your inbox Subscribe Great! Check your inbox and click the link to confirm your subscription. Please enter a valid email address!