A magnetic field exerts a force on particles in the field due to the Lorentz force, according to Georgia State University's HyperPhysics website. The motion of electrically charged particles gives rise to magnetism. The force acting on an electrically charged particle in a magnetic field depends on the magnitude of the charge, the velocity of the particle, and the strength of the magnetic field. All materials experience magnetism, some more strongly than others. Permanent magnets, made from materials such as iron, experience the strongest effects, known as ferromagnetism. With rare exception, this is the only form of magnetism strong enough to be felt by people.
Erythrocytes or red blood cells are formed in the bone marrow from precursor cells called erythroblasts which themselves are formed from pleuripotential stem cells-the mother of all blood cells. Along the way, erythroblasts take various forms/ stages until they differentiate into mature erythrocytes.
Haematopoiesis. Erythropoiesis (from Greek 'erythro' meaning red and 'poiesis' meaning to make) is the process which produces red blood cells (erythrocytes). It is stimulated by decreased O 2 in circulation, which is detected by the kidneys, which then secrete the hormone erythropoietin.