We’re just a bunch of cells talking to other cells 🤗⁠ ⁠ Did you know the average adult (human) has more than 5 liters of blood in their body? This makes up 6% to 7% of the body weight! Blood delivers nutrients and oxygen to every organ, every tissue, and every cell of the living human body. Blood is composed of around 60% plasma, a fluid that mainly contains water, proteins, sugars, and fat. Red and white blood cells and platelets compose the 40% left.⁠ ⁠ The most common cells in the bloodstream are red blood cells, also called erythrocytes. The role of red blood cells is to transport oxygen from the lungs to the tissues with the help of a special protein called hemoglobin. Since red blood cells lack a nucleus, they have kind of a donut shape!! This enables them to carry more hemoglobin and thus, more oxygen!⁠ ⁠ _____⁠ ⁠ Every second, around 2-4 million red blood cells are produced by the bone marrow and released into the circulatory system and there are around 4 to 6 million of these...