After 2 block tests and through listening to other doctors, I found out apparently that physiology is the foundation of medicine. Physiology is the subject of taking what you know and understand how things work. It’s very interesting and I’m always eager to read more about it. Unfortunately the teacher does not do a good job to help us understand the concepts. The worst part is his voice does not project well throughout the class; it’s as if he’s mumbling. On top of that he flies through the concepts and expects people to understand it right away. I had to learn the concepts on my own, and once I understand it, I’m fully relaxed and I get more interested.
The concept of pressure gradient of the heart; why is the pressure of the left side of the heart greater than the pressure of the right side of the heart? The answer is long and yet very interesting. In general physics particle from a high pressure environment diffuses to an environment of low pressure. In the heart, the blood comes from the superior vena cava and inferior vena cava vessels goes to the right atrium through the tricuspid valves to the right atrium. The right atrium is a pump, which pumps blood to the pulmonary artery which transfers deoxygenated blood to the lungs to be oxygenated. The oxygenated blood comes out from the lungs to the left atrium through the pulmonary veins. The blood then comes to the left atrium and goes through the mitral valves to the left ventricle. The left ventricle is a pump and pumps the blood to the aortic arch. The aortic arch carries blood all throughout the body. As the blood is distributed throughout the body it is taken to the feet. In the feet the blood is pulled down by gravity so there’s no way for the blood to be carried back to the heart without a mechanism. That’s where the pressure gradient mechanism comes in. The hi-to-low pressure gradient comes into play when the deoxygenated blood from different parts of the blood needs to overcome gravity and return to the heart.
My explanation of the importance of pressure gradients above was written in 10 minutes. The only reason I was able to write the pathway very quickly because it was very easy once I understood where is what and how things work. Once I understood the concept, it came to me flowing like water.
Over here a student must have a strong foundation of physiology above all the other subjects, because without understanding this subject the individual is not a physician.