Blood Circulatory System

The circulatory system moves blood all around the body. It transports oxygen from the lungs to the rest of the body. It also carries nutrients from the food we eat to all parts of the body. The circulatory system helps remove waste products like carbon dioxide from the body. The heart is the main organ of the circulatory system, pumping blood through blood vessels (arteries and veins) to keep everything working properly.

• A network that consists of tubes or ‘vessels’ that carry blood away from the heart and those that bring it back to the heart is spread throughout the body.
• The process of keeping the blood flowing through all parts of the body is called ‘blood circulation.’
• Apart from oxygen, blood carries innumerable other substances from one part of the body to another all the time. That, too, is made possible by the circulation of blood.
• The heart and the network of blood vessels together form the ‘circulatory system.’
• The circulatory system performs the function of transporting various substances like water, hormones, oxygen, soluble nutrients, and waste materials through different organs.

The blood vascular system includes the heart, blood vessels, and blood. The heart works like a pump, pushing blood throughout the body. Blood vessels are like tubes that carry blood everywhere. There are two types:

• Arteries carry blood away from the heart.
• Veins bring blood back to the heart.

Blood moves through the vessels, carrying important things like oxygen and nutrients to all parts of the body. It also carries waste away from the body to be removed.

Blood is made up of two main parts: plasma and formed elements.

• Plasma is the liquid part of the blood that carries nutrients, hormones, and waste. 
• Formed Elements: The solid parts of blood, which include blood cells.

Types of Formed Elements:

1. Red Blood Cells (RBCs): They carry oxygen from the lungs to all parts of the body. They also take carbon dioxide (a waste product) from the body back to the lungs to be breathed out.
2. White Blood Cells (WBCs): They help the body fight infections and protect against germs. And act like the body’s soldiers, defending us from diseases.
3. Platelets: They help form clots when we get a cut or injury. This stops bleeding and helps wounds heal.

Blood coagulation is the process that helps stop bleeding when you get a cut or injury. Platelets in the blood gather at the site of the cut to form a clot. The clot acts like a plug, blocking the injury to stop the blood from leaking out. This helps protect the body and allows the wound to heal properly. Without blood clotting, even small cuts could cause us to lose too much blood.