Blood - moving around our bodies via the circulatory system, consisting of the arteries, veins and capillaries

... Blood Blood constantly circulates throughout our body via the circulatory system, consisting of the arteries, veins and capillaries. The heart pumps this fluid to transport oxygen and nutrients to the body tissues and also removes wastes, in particular, carbon dioxide; a by-product of respiration. Blood consists of both red and white blood cells, as well as plasma. Each specific constituent of our blood serves a different purpose, all of which are vital for human survival. Red blood cells, also known as erythrocytes, make up the largest component of the blood, accounting for approximately 40% of blood volume. Without these specialised cells, the gaseous exchange involved in respiration would not be possible since red blood cells function to carry out the exchange of oxygen and carbon dioxide between the lungs and body tissues. However, for the red blood cells to successfully combine with oxygen, it is imperative that a normal amount of haemoglobin

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