Vitamin B12 helps the body make healthy red blood cells and helps keep nerve cells healthy. It is found in animal foods, including meat, fish, eggs, milk, and other dairy products. The most common cause of pernicious anemia is the loss of stomach cells that make intrinsic factor. Intrinsic factor helps the body absorb vitamin B12 in the intestine. The loss of parietal cells may be due to destruction by the body's own immune system.
The family system. According to Bowen, a family is a system in which each member had a role to play and rules to respect. Members of the system are expected to respond to each other in a certain way according to their role, which is determined by relationship agreements.
Definition of 'class system'. Word Frequency. class system (klÉËs ËsÉªstÉm) noun. a system in which social status is largely determined by the family into which a person is born. A strict social class system emerged from the ashes of the tumultuous Sengoku Era. Trends of 'class system'.