5 interesting facts about circulatory system

5 interesting facts about circulatory system

The circulatory system, also known as the vascular or cardiovascular system, is an organ that allows nutrients to be transported and circulation of blood. These nutrients are carbon, oxygen, hormones, blood cells, carbon dioxide electrolytes, and amino acids, which are transported to and from cells. The substances nourish, stabilize temperature, ph. Fight diseases and maintain homeostasis. In addition, the vascular system involves a lymphatic system that moves Lymph. Blood fluid, including white blood cells, red blood cells, platelets, and plasma, is moved by heart by the circulatory system. Besides, Lymph takes a longer time to pass compared to blood. Let us learn interesting facts about the cardiovascular system.


1. Red blood cells are unique

Red blood cells or erythrocytes are the most common blood cell in verb rates, which bring oxygen to the body through the circulatory system. Red blood corpuscles deliver oxygen in the lungs, gills, and deliver to tissues and fit in blood capillaries. Moreover, RBC has a cytoplasm, which binds oxygen as well as red color in blood. RBC has no nuclei like other cells found in the body. These make them have a large room for carrying oxygen. However, cells cannot synthesize or divide new components when there is no nucleus. Erythrocytes damage or die from aging after they have circulated for at least 120 days. Bone marrow frequently manufactures new erythrocytes to replace perished ones.

2. The big body has a lower heart rate

A normal heart rate of adults is between 60 to 100 beats in a minute. A slower heart rate may indicate the efficient functioning of the heart and cardiovascular fitness. For instance, a real athlete can have a normal constant heart rate from 40 beats in a minute. A low heart rate or high heart rate can indicate sickness. Heart rate is affected by factors like body size, medications, emotions, air temperature, age, fitness, and diabetes, and body posture. Furthermore, the rate of the heart is inverse to the size of the body across animals. Generally, the bigger the organism is, the lower the heart rate. For example, a blue whale has a heart like compact that only beats five times in a minute.

3. The heart does not need body

If there is oxygen, the heart is in a position to beat without depending on the brain. The heart will only stop to beat when all systems have stopped working after brain death. Also, diaphragm and lungs can stop functioning while the heart is still beating. Therefore, there is more oxygenated blood in the body for use after death. You can as well remove a human’s body, and the heart will still beat.

4. Heart can break

If you imagine a broken heart, all you put in mind is a type of cartoon. However, a broken heart may cause cardiac problems. There is a strong relationship between heart disease, depression, and mental health. Takotsubo cardiomyopathy, stress-induced cardiomyopathy, or broken heart syndrome may come despite health. Women are more likely to experience more intense chest pain, unlike men. This heart syndrome can be misdiagnosed as a heart attack seeing that symptoms are the same. Researchers explain that heart syndrome is caused by divorce, death of someone, romantic rejection, or betrayal.

5. Human blood has distinct colors

Rich oxygenated blood, which flows in capillaries and arteries, appears to be bright red. It becomes dark red as it goes to the heart after delivering oxygen to the body. Sometimes veins can appear blue like inside your skin, but it does not mean that the blood is blue. The deceptive color depends on light penetration on your skin as well as a reflection of the eyes.

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