Cells known as oligodendrocytes often ensheath these very long processes with specialised regions called myelin. The loss of myelin is a hallmark of MS B B cell - one type of white blood cell of the immune system that produces antibodies that 'attack' foreign molecules.
Mothers pass their antibodies to their babies across the placenta and in breast milk.
Together they form the genetic blueprint for an individual. G gene - a stretch of DNA that forms a small part of a chromosome. Thousands of genes together make up a chromosome that contains a partial or complete instructions for a particular characteristic. These characteristics may be visible to the naked eye, such as skin colour, or invisible, for example speed of skin growth. Scientists estimate that human beings have approximately 35,0000 genes.