Explain the working of the heart.
Aheart is a specialized organ made of cardiac muscle.The strong muscular walls contract (squeeze), pump the blood throughout your body,
All living organisms require few fundamental elements like food, water and air to support their life. On a daily basis, we ensure these elements by eating, drinking and breathing. But, how are these transported from one place to another in our body? Here we will learn about a circulatory system and heart which helps in the transportation of food and other requirements to different parts of the body.
Circulatory system Circulatory system, as the name suggests it is a system which circulates everything throughout the body. In order to circulate something we need a messenger and messenger needs a pathway to follow. Moreover, there will be a center which sends messages. The circulatory system of a human body works on this principle.
Blood is a fluid present in our body which circulates food, water and air to various body parts. Blood travels through a defined set of tracks called blood vessels. The main center which pumps blood is our heart.
Blood
Blood is the most abundant body fluid which transports food, oxygen and other substances to various parts of the body. Other than transportation blood has the role of defence also. The composition of blood includes plasma, blood cells, proteins and salts.
Plasma, fluid part of blood.
Blood cells, solid part of blood. There are three types of blood cells.
Blood Vessels
Blood vessels are the pathways in which blood travels to different body parts. There are two pathways one which carries oxygenated (oxygen-rich) blood and other carries deoxygenated blood (carbon dioxide-rich) blood. Blood vessels which transport oxygenated blood are called arteries. Blood vessels which transport deoxygenated blood are called veins.
Artery Vs Vein
Exception
a) Pulmonary arteries are arteries which carry deoxygenated blood from the heart to lungs
b) Pulmonary veins are veins which carry oxygenated blood from lungs to the heart.
Heart
A heart is a fist-sized organ located in the chest slightly towards left. Despite its size, the heart is a very crucial organ of a body. It works hours non-stop. Mixing of oxygenated blood and deoxygenated blood is resolved by four chambers of the heart. Two atria and two ventricles together called the four chambers of the heart. Atria are upper chambers whereas ventricles are lower chambers.
Circulation
1) Veins collect deoxygenated blood from different parts of the body → Right atrium
2) Right atrium → Right ventricle
3) Right ventricle → Pulmonary arteries
4) Pulmonary arteries → Lungs
5) Lungs → Pulmonary veins
6) Pulmonary veins → Left atrium
7) Left atrium → Left ventricle
8) Left ventricle → Arteries carry oxygenated blood to different parts of the body.
Circulation via Heart
All living organisms require few fundamental elements like food, water and air to support their life. On a daily basis, we ensure these elements by eating, drinking and breathing. But, how are these transported from one place to another in our body? Here we will learn about a circulatory system and heart which helps in the transportation of food and other requirements to different parts of the body.
Circulatory system
Circulatory system, as the name suggests it is a system which circulates everything throughout the body. In order to circulate something we need a messenger and messenger needs a pathway to follow. Moreover, there will be a center which sends messages. The circulatory system of a human body works on this principle.
Blood is a fluid present in our body which circulates food, water and air to various body parts. Blood travels through a defined set of tracks called blood vessels. The main center which pumps blood is our heart.Blood
Blood is the most abundant body fluid which transports food, oxygen and other substances to various parts of the body. Other than transportation blood has the role of defence also. The composition of blood includes plasma, blood cells, proteins and salts.
Plasma, fluid part of blood.
Blood cells, solid part of blood. There are three types of blood cells.
Blood Vessels
Blood vessels are the pathways in which blood travels to different body parts. There are two pathways one which carries oxygenated (oxygen-rich) blood and other carries deoxygenated blood (carbon dioxide-rich) blood. Blood vessels which transport oxygenated blood are called arteries. Blood vessels which transport deoxygenated blood are called veins.
Artery Vs Vein
Exception
a) Pulmonary arteries are arteries which carry deoxygenated blood from the heart to lungs
b) Pulmonary veins are veins which carry oxygenated blood from lungs to the heart.
Heart
A heart is a fist-sized organ located in the chest slightly towards left. Despite its size, the heart is a very crucial organ of a body. It works hours non-stop. Mixing of oxygenated blood and deoxygenated blood is resolved by four chambers of the heart. Two atria and two ventricles together called the four chambers of the heart. Atria are upper chambers whereas ventricles are lower chambers.
Circulation
1) Veins collect deoxygenated blood from different parts of the body → Right atrium
2) Right atrium → Right ventricle
3) Right ventricle → Pulmonary arteries
4) Pulmonary arteries → Lungs
5) Lungs → Pulmonary veins
6) Pulmonary veins → Left atrium
7) Left atrium → Left ventricle
8) Left ventricle → Arteries carry oxygenated blood to different parts of the body.
Circulation via Heart
