And what that basically means is the entire structure of the skeleton is found inside our body and this is in contrast to the exoskeleton which contains the entire structure of the skeleton outside of the body. Now, the exoskeleton sheds as the organism grows but the endoskeleton does not heartshed, in fact it grows as the organism itself grows. Now, the human skeletal system consists of two types of connective tissue. We have bone and we have cartilage. Now, when the human being is born we have 270 bones. But as the organism grows and eventually develops into an adult the number of bones decreases to 206.