So the thymus consists of two lobes. We have the right lobe and our left lobe. And this Thymus releases a type of hormone known as thyomosin. Now, as we'll see in just a moment, thyomosin is actually involved in building up our immune system. And that's exactly why we'll focus on the thymus in much more detail and how it actually works when we'll discuss the immune system of our body. Now, unlike other endocrine glands that function in our body which function throughout the entire lifetime of the organism, the thymus is special in that it only functions, it only stays active until about puberty.