Describe the transportation of Blood in human beings
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The transportation of blood in humans is done by the circulatory system.It consists of a heart ,blood ,blood vessels.
Basics:
*The arteries carry blood from heart to other parts and it carry oxygenated blood except pulmonary artery.
*The veins carry blood from body to heart. They carry deoxygenated blood except pulmonary vein.
The Heart :
It has 4 chambers 2 atria and 2 ventricle.
Atria receives blood while ventricle pumps it.
Valves:
→ The valves present in heart are tricuspid wall btw right atria ( RA) and right ventricle (RV).
→Bicuspid or mitral valve btw LA and LV
→Semilunar valves btw both RV and pulmonary artery and LV and aorta
Working:
1. Blood from body coming from superior vena cava and inferior vena cava enters the RA.
2. The RA pumps the blood into the RV.
3. Now the tricuspid valve closes stopping the blood from flowing back.
4. Now the semilunar valve open and RV pumps blood into the pulmonary artery.
5. This blood goes to the longs where its purified with oxygen.
6. Now the oxygenated blood from lungs enters LA through pulmonary vein.
7. Now LA pumps blood into LV opening the bicuspid valve.
8. As blood enters LV the bicuspid valve closes preventing back flow.
9. The LV now pumps blood into the aorta. The semilunar valve opens and blood goes to body parts.
That's it!!!!
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Heya bhai.....AK0KThe various organ of the circulatory system in human are heart ,arteries ,veins and capillaries
®Blood is also consider as a part of circulatory system .
In human circulatory system,the heart acts as a pump to push out blood .
The arteries ,veins,and capillaries act as pipes through which the blood flows .These tubes which carry blood are called blood vessels
Thus,There are three type of blood vessels in human body ; Arteries ,vein and capillaries.
{1} ARTERIES--Arteries are wide, elastic and thick walled vessels.
☢It always carry pure and oxygenated blood .
☢it carries blood from near to various part of body.
☢it supply the blood from heart to various part of body with high pressure.
☢ pulmonary artery is an exception which carry impure blood from heart to lungs
☣it consists of three layeers.
1}Tunica exterma
2}Tunica media
3}Tunica interma.
{2} VEINS----veins is a non elastic thin walled vessels
⏩It carry impure blood .
⏩It carry blood from body parts to heart
⏩it supply the blood with low pressure .
⏩It has no any layers
⏩They are non elastic in nature.
⏩Pulmonary veins is an exception which carry pure blood from lungs to heart.
{3}CAPILLARIES---- Arteries branch divided into smaller and thinner blood vessels called capillaries..
It carry both pure and impure blood.
➡HEART ♥♥
The heart is a roughly triangle in shape .it is made up of a special muscles called cardiac muscles .
☸ It is an important muscular and Dard and red organ.
⚛It is situated in the middle of thoracic cavity.
✡It is covered by by two layer
1} pericardium layer and 2} is outer pericardium layer.
☸It consists of four chambered -left Auricle ,left ventricle,Right ventricle ,Left Auricle .
✡The weight of heart in men (Adult) is 300g and in women 250 g.
It plays important role in pumping of blood so,it is also known as blood pumping station.
The heart beats(or beating of heart )circulatee the blood in the human body.We will now describe the circulation of blood in the human body .
1 . when the muscles off all the four chambers if the heart are relaxed ,the pulmonary veins bring the oxygenated blood from the lungs into the left atrium of blood of heart .
2.when left atrium contract ,the oxygenated blood is pushed into the left ventricle through the valv V1.
3.When the left ventricle contract,the oxygenated blood is forced into the main artery called `aorta`.This main artery then branches into smaller arteries which go into different body organs .
4.The main artery carries blood to all the organs of the body like
head ,chest ,arms ,stomach ,intestine ,liver ,kidney ,trunk and legs except lungs .
5.When the right atrium contracts deoxygenated blood is pushed into the right ventricle through the valve V2.
6.And when the right ventricle contracts ,the deoxygenated blood release its carbon dioxide and absorb fresh oxygen from air .so the blood becomes oxygenated again .This oxygenated blood is again sent to the atrium of heart by pulmonary veins for circulation in body.
☢☢
This process is repeated continuously .in the way ,the blood keep on circulation in our body without stopping due to which all the body parts keep on getting oxygen,digested food and other materials all the time .the blood circulation also keeps on removing waste product formed in the cells of the body.
☸the blood circulation system in which the the blood travel twice through the heart in one complete cycle of the body is called double circulation. In human circulatory system the pathway of blood from the heart to the lungs and back of heart and back to the heart is called pulmonary circulation.anf thecpathway of blood from the heart to the rest of the body and back to the heart is called the systematic circulation.these two type of circulation taken together make double circulation.
Hope it helps you..
#Rajukumar###