Fun Facts About Circulatory ideas for Kids

Fun Facts About Circulatory ideas for Kids-Aortic Valve

Circulatory system is more like a delivery system in our body. Blood moves in the human body from heart through blood vessels. The task of the blood is to carry oxygen as well as nutrients to each part of human body. It also carries wastes products of body to clean them. This is all, which is called as circulatory system of the body. We will clarify several fun facts for kids about circulatory system here:

Aortic Valve

Heart

First, we will discuss about the heart. It is muscle of body and its size is almost equal to clenched fist. It has four hollow chambers. Task of each room of heart is to pump blood around the organs of the body. The weight of an adult heart is just about 9-12 ounces that is almost equal to the weight of a can of soda. The weight of the heart is just.5% of the weight of human body but the tasks that it does are big. The heart of an adult pumps about 6000 gallons of blood in a day and that is pretty much when compared to its size. Do you know that our heart beats about 30 million times in a year?

Blood

The function of blood is not just to carry oxygen from heart to the cells of the body. Blood consists of three main parts these are white blood cells, red blood cells and platelets.

The task of the white blood cells is to defend the body against any infection and disease.

The task of red blood cells is to deliver oxygen to the organs of the body. These also carry carbon dioxide and other wastes out of the body.

The third part of the blood is platelets. These help the body in repairs after any injury or illness.

Do you know that in one drop of blood there are 8000 white blood cells, 5 million red blood cells and 25000 platelets?

The thickness of blood is more than water.

Circulation

The blood starts circulating from the left ventricle of heart into aorta. When it leaves heart, blood is full with oxygen. This oxygen spreads throughout the human body starting from aorta. It then passes to the arteries system and after that to the smallest arterioles of the human body.

Aorta is largest artery of human body. The task of arteries is to carry blood out of heart.

The task of veins is to carry blood back to heart.

Do you know that if you strung all the blood vessels of the body and part them, then you can circle the globe with them for about two and half time!

It takes just two minutes for the blood to circulate through the human body. In this short period, it brings oxygen out and carbon dioxide back and it keeps on repeating this process through out the whole span of life!

About the Beats

You all must have heard about heartbeats. These are nothing but the sound of the valves that are present in heart closing. This sound comes as the valves push blood throughout the chambers of the heart and you can hear this with the help of stethoscope. Beats come when the muscles of the heart compact and pump blood out of heart. At first, the right and left atria contracts and pumps the blood to left and right ventricles. After it, the ventricles compact and collectively work to push the blood out of heart. The pause in the middle of the beats is the time when the heart again fills up with the blood to start the process all over again. Pulse rate of the body changes as per the corporal activities of the body. It increases when you do some practice or corporal labor. It also changes agreeing to age. For example, the heartbeat of an adult is 60-100 beats per little and on the other hand, the beat of a newborn baby is 130 beats per minute.

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The Dog's Circulatory system

The theory that is called the circulatory theory of the dog is comprised of the blood, the blood vessels and the heart. The heart of the dog is a four chambered structure that consists of the right and left upper chambers called the atria and the two lower chambers that are called the ventricles. Essentially the heart is a two sided pump, a right side and a left side. They are independently dependent, that is, the upper right chamber or atrium receives the used or deoxygenated blood from the body and them it goes through the right A/V valve or tricuspid valve into the right lower chamber of the heart or the right ventricle and then pumps it to the lungs through the pulmonary valve into the pulmonary artery. Then the left upper chamber or atrium receives the blood from the lungs and then it goes through the left A/V valve called the bicuspid or mitral valve into the lower left chamber of the heart called the left ventricle.

It is then pumped out the aortic valve through the aorta and out to the body. The two sides of the heart are separated by a muscular wall called a septum. The left side of the ventricles is much thicker than the right side due to the fact that the pressure inside the left ventricle is much greater than in the right ventricle and so it has to withstand more pressure and so it is thicker. In a fully industrialized heart, the blood cannot get from one side of the heart to the other without first going colse to the circulatory path that all the blood has to follow. The four valves that we have mentioned are in place to keep the blood flowing in only one direction. When the heart or the valves are diseased, blood can leak through the valves and flow backwards, creating more compromise in heart and circulatory function.

We have talked about the heart being a right sided pump and a left sided pump and that they are independently dependent. This means that the one side acts independently of the other, but its function is totally dependent on the function of the other side. For example, if one of the valves of the arteries, like the aortic valve, is leaking and does not seal the chance properly, then blood can flow back into the ventricle and create a flow qoute for all the blood that is coming from the lungs or from the body. Over time there are two things that the heart itself tries to do to make up for the inefficient operation of the leaking valves. First the heart tries to increase its rate of operation in an attempt to increase the volume of blood that is being pumped. Then it tries to increase its stroke volume by filling the chambers more and so it dilates in an attempt to increase its volume pumped with each stroke or contraction. These two mechanisms fail in a short time and then the heart ends up failing and the dog develops congestive heart failure or Chf.Chf results in fluid accumulation in the abdominal cavity or in the chest, depending on which side of the circulation is affected by the left or the right side of the heart that is failing.