The circulatory system is the system of our body which is responsible for transporting blood, nutrients, oxygen, and waste products throughout the body. It consists of the heart, blood vessels (arteries, veins, and capillaries), and blood. The main function of our circulatory system is transportation of oxygen-rich blood to tissues and removing carbon dioxide and other waste products out of our body.
 |
| BLOOD CIRCULATORY SYSTEM |
Types of Blood in our Circulatory System
There is two types of blood; Pure Blood (Oxygenated Blood), Impure Blood (Deoxygenated Blood)
- Oxygenated Blood : The blood which have high amount of oxygen (Oxygen-rich blood) and color of this blood is bright red. Pure blood flows through Arteries and Pulmonary Veins.
- Deoxygenated Blood : The blood which have less amount of oxygen (Carbon-dioxide-rich blood) and color of this blood is deep red and purple. Impure blood flows through Veins and Pulmonary Arteries.
Human Heart
Some important points on Heart--
- Heart weight : 280 gram to 330 gram ( Male > Female )
- Shape : shaped like a closed fist ( बंद मुट्ठी के आकार का )
- The main function of Heart is to supply Oxygenated blood to whole parts of our body and remove Deoxygenated blood from whole parts of our body. It acts like a pump. When it contracts (Systole), it supplies Oxygenated blood to whole parts of our body and when it relaxes (Diastole), it removes Deoxygenated blood from whole parts of our body. Due to this systole and diastole, sound is produced and this sound is called Heart Beats. Heart Beats sounds like Luv-Dub.
Function Of Heart
Heart is divided into two parts; left part of heart and right Part of heart. Now both left and right part of the heart is divided into two-two parts; Auricle (Atrium) and Ventricle. So, finally heart is divided into four parts; named- Left Auricle (Left Atrium), Left Ventricle, Right Auricle (Right Atrium) and Right Ventricle. Left part of the heart have thicker wall compared to right part of the heart.
Lungs works as a purifier of blood. Lungs supply oxygenated blood to the heart through Pulmonary veins. Oxygenated Blood is supplied to the left part of the heart. So, oxygenated blood is firstly supplied to the left atrium (Auricle) and then it flows towards left ventricle through mitral valve. Left ventricle has more thicker wall compared to left auricle wall. Now, oxygenated blood is supplied through Aorta and Aorta is divided into arteries and through arteries blood is supplied to all parts of the body. As we know our all body part need energy and through oxygenated blood, oxygen is used to the oxidation of glucose and we get energy and form carbon-dioxide.
Now, Carbon di-oxide is supplied from Superior and Inferior Vena Cava to Right Auricle (Right Atrium). Now, this di-oxygenated blood is moved towards Right Ventricle through Tricuspid Valve. Here from Right Ventricle, blood is supplied to the lungs through Pulmonary Arteries. And lungs purifies di-oxygenated blood to oxygenated blood.
Blood Pressure
The pressure on the Aorta in contraction and relaxation of the heart is called blood pressure.
- Heart Contract (Systole) - Normally Systole (120mm/Hg)
- Heart Relax (Diastole) - Normally Diastole (80mm/Hg)
- Blood Pressure is measured by a measuring meter know as Sphygmomanometer.
BLOOD PRESSURE CONDITION
SYSTOLEN (mm/Hg)
DIASTOLE (mm/Hg)
LOW BLOOD PRESSURE
90
60
IDEAL BLOOD PRESSURE
120
80
PRE-HIGH BLOOD PRESSURE
140
90
HIGH BLOOD PRESSURE
190
100
Conclusion
The circulatory system plays a critical role in maintaining our body's health by transporting essential elements such as oxygen, nutrients, and waste products. With the heart as its central organ, supported by blood vessels and lungs, this system ensures a continuous supply of oxygen-rich blood to tissues and removes carbon dioxide. The heart’s structure, divided into four chambers, enables efficient blood flow and pressure regulation, with each heartbeat contributing to the circulation process. The lungs act as purifiers, refreshing oxygen levels in blood, which is then measured as blood pressure, indicative of the heart's activity and efficiency.
0 Comments