👉 The term "incunabular" is a term used in the field of anatomy and physiology to describe the process by which nerves and blood vessels are formed between bone elements. This occurs during fetal development, as the mother's uterus prepares the bones for implantation during pregnancy. During this period, the mother's body creates a network of ligaments, cartilage, and other connective tissue around her fetus, including nerves and blood vessels. These structures are called "incunabular" because