Describe the structure of human heart in brief.
The human heart lies near the middle of the thoriccavity betweentwo lungs. It is the hollow, conical organmade up of cardiacmuscles. It is about the size of afist of the owner.It measures about 12cm in lengthand 9 cm in breadth. The average weight of the heartisabout 300 gm in adults.
The human heart contains four complete chambers. ItE is dividedinto two halves (right and left) by septum.Each half consists of two chamber the upper, smallsized atrium or auricle and lower larger sizedventricle....