In this article we will discuss about the origin of the frog heart beat with the help of suitable diagram. By separating atria from the ventricles of excised hearts, William Harvey in 1628 had shown that the atrial rhythm was higher than the ventricular rhythm. Keith and Flack (1907) have described that from the S.A. node the heart beat first [...]
Here is an essay on the ‘Autonomic Nervous System’ for class 11 and 12. Find paragraphs, long and short essays on ‘Autonomic Nervous System’ especially written for college and medical students. Essay # 1. Introduction to Autonomic Nervous System: The autonomic nervous system supplies the viscera. The viscera include the gastrointestinal tract, the respiratory and urogenital systems, the heart and [...]
In this essay we will discuss about the process of reproduction in vertebrates. Reproduction in Vertebrates Essay Contents: Essay on the Process of Reproduction in Fishes Essay on the Process of Reproduction in Amphibia Essay on the Process of Reproduction in Reptilia Essay on the Process of Reproduction in Birds Essay on the Process of Reproduction in Mammals Essay # [...]