Regulation mechanism of human blood pressure
In order to understand. Hypertension is a serious health problem, “this concept, you must first be familiar with the concept of blood pressure. This chapter describes how the body regulates blood pressure, why the body regulates blood pressure, and what impact it will have on the system.
The heart and blood vessels in the body cooperate with oxygen and nutrients to the body, and to remove the waste, such as carbon dioxide, which is exhaled when you breathe. Blood is the transmission medium of these substances. Blood pressure is the result of two kinds of forces in the body that produce the opposite effect. One force is produced when the heart pumps blood, and the other is that the blood flow is generated by the arteries that transport oxygen and nutrients to tissues. The pressure produced during the contraction of the heart is called the systolic pressure, and the pressure of the blood on the wall of the heart is called the diastolic pressure. If the pressure from the heart pumps blood or the resistance (or both) is too large, you get high blood pressure.
Blood through the heart of the pump blood function in the body to continue to cycle. The heart pumps the blood to the lungs to carry oxygen, and then the other parts of the body, and then transmitted to the heart through the cardiovascular system. Because the heart and blood vessels are involved in the same cycle, you often hear the name – the cardiovascular system.
Heart to do a small volume (about a clenched fist size) but powerful pump, it makes the blood circulation in the cardiovascular system. It is the most industrious muscle, and it is not the beat of the day and night. The heart beats about 1 times per second, and the total length of the blood pump is 9.6 ~ 16 km long.
The heart is divided into 4 separate chambers, which prevent the blood flow and the mixing of blood between the chambers. The circulation of blood is first received by the first chamber, the right atrium, and once the oxygen of the blood is entered into the atrium, it is pushed into the next chamber of the heart — right ventricle, right ventricle to be. Used in. Blood through the pulmonary artery (the only blood supply of blood in the arteries) directly to the lungs. Lung tissue filters carbon dioxide and provides oxygen for the blood to make it an oxygen rich blood. And then the oxygen enriched blood is returned to the next chamber, left atrium, through the pulmonary veins (the only blood carrying oxygen rich blood). When oxygen enriched blood enters the left atrium, it will be pushed into the final cardiac chamber, left ventricle.
The left ventricle is the main chamber of the heart. As the largest and most powerful heart chamber, the left ventricle will oxygen enriched blood through the body’s largest artery – the great arteries transported to the whole body. Left ventricular work is very hard, so it is about 1.3 cm thick, almost 3 times more than the wall of the right atrium.
Like other organs, the heart also needs oxygen and nutrients to play a role. The heart is supplied with oxygen by the two coronary arteries (left and right) in the large arteries. Used in. Hypoxia blood directly into the right atrium through the coronary veins.
Oxygen enriched blood. Used in. Blood was left and the cardiovascular system was divided into two parts. Arteries send oxygen and nutrients from the heart to the body, while the blood supply to the heart, and the blood flow back to the heart. Microvascular away from the heart, into the tissue in the arteries and veins will be divided into smaller and more fine. The blood from the arteries of the blood vessels is caused by blood from the artery. Capillaries are the smallest blood vessels in the human body, which transport oxygen and nutrients to a single cell and collect the waste products. The lack of oxygen and oxygen rich blood from the blood flow from the capillaries to the micro vein (minimal), and then the blood from here sent back to the heart.
A healthy person’s arteries are strong and elastic. When the heart pumps blood through them, they stretch. In the need to control the flow of blood, the diameter of the artery will change. In order to raise blood pressure, the tiny arteries will shrink and become narrow. You will understand their working principles in the back.