👉 A fluid is a substance that takes the shape of its container while maintaining a constant volume, unlike gases which expand to fill any space. The essential fluid in the human body is blood, vital for transporting oxygen, nutrients, hormones, and waste products throughout the body. It also plays a crucial role in immune response and maintaining body temperature. Blood is composed of cells like red blood cells, white blood cells, and platelets, along with plasma, a liquid component rich in proteins and nutrients. This fluid is indispensable for sustaining life and ensuring the proper functioning of various bodily systems.
