So that allows us to jump directly to the immune protection of that placenta. It basically not only protects that blood system of that fetus from acquiring the same type of bacterial cells and infected cells found within that mother, but it also allows the movement of tiny antibodies called immunoglobulin g. So one type of antibody known as IgG or immunoglobulin G can easily make its way across the membrane and into the blood system of that fetus. And the immunoglobulin g protects that fetus from different types of pathogens that can infect that growing embryo. So we see that the placenta, as a result of allowing the movement of immunoglobigging gives that growing embryo passive immunity because when the embryo grows the immune system of that embryo is not fully developed. So function number one is as an endocrine gland. Function number two is it provides a route by which there's an exchange between the nutrients such as glucose, water, minerals, so salts as well as amino acids between the blood of that mother and the blood of that fetus.