What is meant by double circulation ? What is its significance ?
Double circulation of blood : In double blood circulation, first impure blood comes to the heart and then it is supplied to the lungs for purification. Then pure blood is collected and poured into heart and it is supplied to all the parts of the body. Double circulation comprises two types of circulation as :
1. Pulmonary circulation : It is the circulation in which impure blood from rt. ventricle of heart goes to lungs and after purification it is poured back into the heart (left auricle).
Significance : Due to it blood is purified.
Right auricle Fig. Double circulation of blood in mammals
2. Systemic circulation : It is the circulation in which pure blood from left ven heart is pumped to all the parts of the body and then impure blood is collected and poured into right auricle.
Name the components of the formed elements in the blood and mention one major function of each of them.
What is the significance of atrio-ventricular node and atrio-ventricular bundle in the functioning of heart?
What is the differences between lymph and Blood?
Describe the evolutionary changes in the pattern of heart among vertebrates.
