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

Rhys Menzel on Instagram: "Period blood has powerful biological properties and is a vital sign for health. It contains unique proteins, stem cells, and immune cells that can be used in medical research for things like skin repair, understanding inflammation, and developing treatments for diseases like endometriosis and diabetes. Additionally, observing your menstrual cycle can provide clues about your overall health, with issues like irregular or painful periods signaling potential problems Peri