Important Functions of Heart and Blood
The Heart
The heart is an organ in your chest, and it is halfway
comprised of muscles. As its muscles contract, or fix, the heart pushes blood
around the veins, or cylinders, inside your body. The blood hefts processed
food and oxygen around the body and removes squander. Your heart beats with the
goal that it can siphon blood around your body. Our heart is truth be told an
extremely strong muscle. It has an extremely exceptional capability as well. It
pump new blood in our body. Like a pump that has different sides; a right side
and a left-side.
The
right half of our heart gets blood from the body and siphons it to the lungs.
The left half of the heart gets blood from the lungs and siphons it back to the
body. Both the right and the left sides have two parts open and near let the
blood come in and leave the heart. As these parts cause the sound we to hear as
our heart beat.
Heart and lungs cooperate to siphon unadulterated
blood to the body. As we realize that blood conveys oxygen and sustenance to
the body organs. At the point when the blood has conveyed its oxygen to the
body parts, it returns to the heart to get an oxygen top off. This oxygen less
blood additionally contains some waste material like carbon dioxide. The right
half of the heart gets this sullied blood and sends it to lungs. In the lungs,
the blood get more oxygen and surrender carbon dioxide. The blood is currently
brimming with oxygen and enters the heart through the left side. The heart then
siphons this new blood back to the body organs.
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Blood
Blood contained in veins is a connective tissues as a
red thick liquid. On a normal, a sound man has around 5 litres of blood in the
body, while a lady has around 500 ml under a man. Complete volume of blood is
supposed to be 60-80 ml for every kg of body weight.
Red
Blood Corpuscles (RBC)
Blood is made up of red blood cells, white blood cells
and platelets floating in a yellow liquid called plasma. Plasma is made by the
body from what we eat and drink. It is made up of proteins, glucose, nutrients,
chemicals and hormones. More than half of the blood is plasma. It carries
nutrition for the body.
The blood is red because it contains red blood cells.
These cells are made up of protein called haemoglobin. Haemoglobin contains
iron, which gives red colour to our blood. Red blood cells carry oxygen around
our body and give energy to all the organs in the body. Our organs need oxygen
to function properly.
Blood goes all around the body and back again. After
it leaves the heart, the blood delivers oxygen to the body. By the time the
blood returns to the heart, the oxygen has been used up. So, the heart sends
the blood to the lungs to collect more oxygen. Then, it passes back to the
heart to be pumped around the body again.
White
Blood Corpuscles (WBC)
White blood cells are like little warriors floating in
your blood. They fight the germs like viruses and bacteria. Usually, when we
stay healthy, the amount of white blood cells is less in our blood. It is only
when we get sick that our body makes more of white blood cells to fight the
germs attacking us. The WBC are the soldiers of the body’s defence system and
their main function is to fight infection.
Blood
Vessels
There are long tubes inside our body that carry blood
within them. These tubes are also called blood vessels. There is a huge network
of blood vessels in our body. If we laid all our blood vessels down, from end
to end, they will be about 60,000 miles long for a child and about 100,000
miles for an adult. The blood vessels carrying fresh blood from the heart to
the body are called Arteries. The blood vessels carrying the impure blood from
the body to the heart are called veins.
An adult has between 4 and 6 litres of blood. When old
blood cells wear out, new ones are made inside your bones in the part called
the bone marrow. We each have one of eight different types of blood, called
blood groups. If people lose blood in an accident, doctors are careful to check
which blood group they need before giving them new blood.
Sometimes when we are very sick, the doctor asks us to
get some blood tests done. Blood can provide a lot of information. The doctor
would want to look at the number of red blood cells, white blood cells and
platelets to see what can be wrong with you. He also checks for the levels of
chemicals, proteins, glucose and hormones that are present in the blood. All
these things should be present within a range. If their amount is more than or
less than this range, it means there is a problem and our body is not
functioning properly. The doctor identifies the problem and gives us medicines
accordingly.
Blood
Group
Human blood was classified into four groups, A, B, AB
and O by K. Landsteiner in 1900. The O group can be given to any of the other
groups and therefore, a person possessing the O group is known as universal donor. Group AB is called universal recipient and can receive A,
B, AB and O blood groups.
Blood group A - can donate blood to A, AB. Can receive
blood from A and O.
Blood group B –can donate blood to B, AB. Can receive
blood from B and O.
Blood group AB – can donate blood to only AB. Can
receive blood from AB, A, B and O.
Blood group O – can donate blood to AB, A, B and O.
Can receive blood from only O.
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