Lower case "P" stands for negative common, (base ten) "H" stands for element hydrogen, and D stands for doctor
The absorbed calcium makes the bone and teeth stronger.
Answer:
Soon after conception, the embryo differentiates into three layers of cells. The mesoderm, or middle layer, will develop into your baby's bones – as well as her heart muscles, kidneys and sex organs. The inner layer (called the endoderm) becomes your baby's digestive system, liver and lungs.
The skeletal system is composed of cartilage and bone and functions as a structural framework for the body, facilitating movement and protecting internal organs. ... During fetal development, long bones form through the process of endochondral ossification, and flat bones develop by intramembranous ossification.
The drinking age, which the 21st Amendment made the responsibility of individual states, started dropping around the country. Critics of the change decried rises in alcohol-related traffic fatalities among 18- to 20-year-old drivers in areas where the drinking age had been lowered.