Question

Mention the external features you observed in the heart


Write the names of the structures that protect the heart ​

Answer 1

heart divided into four chambers ro prevent the mixing of oxygenated and deoxygenated bloods. the four chambers further divided into two upper chambers and two lower chambers. the two upper chambers are small and thin walled called auricles or arterioles. the two lower chambers are large and thick walled called ventricles