Final answer:
Accessing marrow has advantages such as blood cell production, fat storage, and immune support. The skull's development and structure are vital for brain growth and protection. Both marrow and skull have significant roles in health and development.
Step-by-step explanation:
The advantages of accessing marrow in large bones and the brain in skulls relate to critical biological functions. Marrow, found within large bones such as the femur, is essential for producing blood cells, storing fat, and assisting with the immune system. Access to marrow is important in medical procedures like bone marrow transplants, which can be life-saving for patients with certain diseases. The skull, protecting the brain, is crucial for safeguarding this vital organ from injury. The development of the skull through processes like intramembranous ossification enables the brain to grow and expand during childhood, while the presence of fontanelles and sutures allows for the necessary flexibility and deformation during childbirth.