Pulmonary circulation transports oxygen poor blood from the right ventricle to the lungs to get oxygenated.
A newborn's skeleton is composed mostly of cartilage, which will ossify as the infant grows. It will be made if mire than 300 parts, many of which will combine into single bones.
Coal mining causes massive land use, tailings (waste), pollution to the air and water, and the effects it can have on the workers mainly includes respiratory problems.
Some things that could happen to prevent pollution is to keep the area as contained as possible away from water outlets. Safer, environmentally friendly chemicals could be used instead of chemicals that pollute the air and water. Mining waste needs to also be properly disposed of and away from any water is could seep into.
Servers depression.....from the highs of mania on one extreme, to the lows of depression on the other.
