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Showing posts with the label circulatory system

Life Processes - Transportation

 Life Processes - Transportation The transport system in human beings is known as circulatory system. There are three main components of circulatory system in human beings. They are 1) Blood 2) Blood vessels 3) Heart Blood Blood is a specialized body fluid that plays a critical role in maintaining life. It is a connective tissue composed of plasma and blood cells, circulating through the heart, arteries, veins, and capillaries. Components of Blood Blood is made up of four main components: 1. Plasma Plasma is the liquid part of blood, making up about 55% of its total volume. It is mostly water (around 90%) and contains proteins, hormones, nutrients, electrolytes, and waste products. Plasma acts as a carrier for blood cells and other substances. 2. Red Blood Cells (Erythrocytes) Red blood cells are responsible for transporting oxygen from the lungs to the rest of the body and returning carbon dioxide for exhalation. They contain hemoglobin , a protein that binds oxyge...