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.
(2) Family diversity is produced by the same structures that organize society as a whole. (3) Families are embedded in and shaped by interconnected systems of class, race and gender. (4) Family diversity is constructed through social structure as well as the actions of family members. (5) Understanding families means challenging monolithic ideas that conceive of the family in idealistic ways.