I believe it's made out of cartilage. Just like our knees and noses are made out of. The mother would need to consume more calcium to aid the fetus in growing strong bones for the baby. <span />
This cartilage forms the initial skeleton of the fetus; right after three months of development. This cartilage is the precursor to bones that will develop from the endochondral ossification process.
During endochondral bone development, hyaline cartilage functions as an epiphyseal growth plate and this plate remains functional as long as the bone is growing in length. In the adult's long bone, hyaline cartilage is present only on the joint surface. In adults, it is also present as a skeletal unit in the trachea, bronchi, larynx, nose and extremities of the ribs (costal cartilages).
Rate of perceived Exertion measures the level of intensity of exercise. It measures the physical activity intensity level. It determines whether a person is working too hard or is at moderate level of physical activity. Maximum heart rate for any individual is calculated by subtracting the persons age from 220. The answer is the maximum heart rate that a person may experience during exercise.
Many of the germs that cause respiratory (breathing) diseases are spread by droplets that come from coughing and sneezing. These germs usually spread from person to person when uninfected persons are in close contact with a sick person. Some people may become infected by touching something with these germs on it and then touching their mouth or nose.
