In this article we will discuss about:- 1. Meaning of Diffusion 2. Factors Controlling Diffusion 3. Diffusing Capacity for O2 and CO2. Meaning of Diffusion: Diffusion means movement of a substance from an area of high concentration to an area of low concentration. In the present context the diffusion of O2 from alveoli to pulmonary capillaries and of CO2 in [...]
In this article we will discuss about the six main factors that maintain circulation in human heart. Factor # 1. Pumping Action of the Heart: This is the main motive force of circulation. Factor # 2. Elastic Recoil of the Arteries: Ventricles contract during systole and relax during diastole. So during systole certain amount of blood is being led directly [...]
In this article we will discuss about the structure of junctional tissues of human heart with the help of suitable diagram. Cardiac muscle consists essentially of certain specialised structures which are responsible for initiation and transmission of cardiac impulses at a higher rate than the rest of the muscle. Those specialised cardiac tissues operate such mechanism are collectively known as [...]