Meet the Bone Crushers (Full Episode) | Animal Fight Night | Nat Geo Animals

Everything We Learned About Animals and Life on Earth This Year

Everyone Warned This Dog Mom About Having A Staffy And A Newborn Baby | The Dodo

How Everything Works on Instagram: "Blood types are determined by molecules called antigens that sit on the surface of red blood cells. These act as identification markers, helping the immune system recognize which cells belong in the body. The main system for classifying blood is the ABO system, which divides blood into four groups: A, B, AB, and O. Type A has A antigens, type B has B antigens, type AB has both, and type O has neither. Another key component is the Rh factor, which indicates whe