In this article we will discuss about:- 1. Anatomical Considerations of Coronary Circulation 2. Methods of Studying Coronary Circulation 3. Normal Values of Coronary Circulation 4. Ventricular Action Affects Coronary Circulation 5. Circulatory Status of the Cardiac Muscle under Certain Diseased Conditions Anatomical Considerations of Coronary Circulation: Blood supply to the heart is mainly carried out by the two coronary [...]
Anatomy of Circulation: Blood enters lungs through two sources; pulmonary artery and bronchial arteries. The cross-sectional area of the pulmonary artery is same as that of the aorta, but it is more elastic and distensible. Through the pulmonary artery venous blood of the right ventricle goes to the lungs for oxygenation. It also carries nutrition to the pulmonary tissues. Bronchial [...]
These changes are described below under the following headings: 1. Changes in Respiration: i. Pulmonary Ventilation: Pulmonary ventilation in moderate exercise is always linear with the amount of O2 absorbed. It has been observed that a linear relationship between the work load and the pulmonary ventilation is maintained until the work load is so increased that the steady state is [...]