Red b cells are biconcave, disc-shaped cells that transport oxygen from the lungs to body cells. They circulate around the body in the blood and remove carbon dioxide to the lungs for exhalation. Red color comes from the oxygen-carrying protein haemoglobin. Red b cells are the most abundant cell in the blood, have no nucleus, are about 7 micrometres in diameter. White b cells perform functions ranging from cleaning up cellular debris, to defending the body against bacteria and other pathogens.
Red blood cells
RedBall Project by Kurt Perschke who says, "As RedBall travels around the world, people approach me on the street with excited suggestions about where to put it in their city. In that moment the person is not a spectator but a participant in the act of imagination. That invitation to engage, to collectively imagine, is the true essence of the RedBall Project." photo of LaSalle Bridge, Chicaago/Rex Features via telegraph.co.uk Thanks to @Josh Draper#RedBall_Project #Kurt_Perschke #telegraph_co_uk