Within the human body, approximately 37.2 trillion cells labor energetically around the clock, 365 days a year. Freshly trained, the cheerful and slightly scatterbrained Sekkekkyuu AE3803 is prepared to undertake the crucial duty of oxygen transport. Meanwhile, Hakkekkyuu U-1146 is diligently patrolling and destroying foreign bacteria that aim to turn the body into their new base. In another area, small platelets are queuing up for a new construction project. Handling wounds and allergies, getting lost en route to the lungs, and squabbling with similar cell types, the daily routines of cells are constantly hectic as they collaborate to maintain the body's health!