internal structure of the heart
Answers
Explanation:
heart is present almost at centre in thoracic cage it is present behind the ribs between two lungs and slightly inclined on left side . size of our heart is equal to one's own fist and its weight is about 360 gram. it is covered by a double layered peritoneal membrane of fluid is present between two membranes due to which a heart is protected from friction and mechanical shock human .heart is a muscular organ it is made up of involuntary cardiac muscles. they contact the contract and relax with a definite rhythym this is called beating of heart. internally heart is divided into right and left compartments by a vertical partition. each of those compartments is again divided into two chambers thus, in all heart consists of four chamber upper chamber are called as (singular atrium) and lower Chambers as ventricles .
