There are two main types of memory cells in the body which are produced as main responses to external agents that attack the body. They are called B-cells and T-cells. These types of memory cells can respond speedily in the immune system when they sense any external matter that poses danger to the body. There are equally responsible for controlling and protecting the neonates and immature fetuses that are not strong enough to defend themselves against external attacks. These functions are performed by these memory cells as they passively transfer the maternal antibody. But as we age, the immune system becomes weak which explains why old people are more prone to the attack of diseases than those that are younger.
Features of the different types of memory cells
The memory B-cells have much longer life span and can reproduce faster than its other memory cell counterpart. These cells produce large amounts of antibody by producing plasma cells after being exposed to certain antigens responsible for creating them. They live very long in the human body and keep secreting antibodies. However, the number of antibodies they secrete diminishes as they grow weaker which is caused by the aging factor in humans.
The two types of memory cells hold soluble antigens such as diphtheria toxiods, which are produced when an individual takes a DTP vaccine. These antigens are further divided into different cell fragments that transfer the cell surfaces.
There are two categories of the B cells: the short lived B cells and the long lived B cells. These two types of memory cells differ in respect to the differential expressions made by the markers on the cell surfaces.
In a lot of times, the memory B cell stay at the same region where they are produced, but it is also very possible for them to re-circulate. The function of the long-lived B cell is to secrete antibodies which explains why they are mostly found in the bone marrows, but the na_