4 major organs in the circulatory system cardiovascular system

Answer 1

The major organs in the circulatory system, also known as the cardiovascular system, are:

1. The heart: It is the main organ of the circulatory system and is responsible for pumping oxygenated blood to the body's tissues and organs and receiving deoxygenated blood from them.

2. Blood vessels: These include arteries, veins, and capillaries. Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart. Capillaries are small, thin blood vessels that connect arteries and veins, allowing for the exchange of oxygen, nutrients, and waste products between the blood and the body's tissues.

3. Lungs: Although they are part of the respiratory system, the lungs play a vital role in the circulatory system by oxygenating the blood and removing carbon dioxide. Oxygenated blood from the lungs is then transported back to the heart.

4. Blood: Blood is a fluid connective tissue that carries oxygen, nutrients, hormones, and waste products throughout the body. It consists of red blood cells, white blood cells, platelets, and plasma.

These four major organs work together to ensure the proper functioning of the circulatory system, which delivers vital substances to cells and removes waste products from the body.