Water is the most naturally abundant and widely used extinguishing substance. It extinguishes fire by cooling. There are three main types of water deluge systems, components of which are shown below. From left to right, they are: fine water spray systems, sprinkler systems, and water spray systems.
Vitamin D, a steroid hormone that influences virtually every cell in your body and has been positively linked to health conditions ranging from cancer to heart disease, may significantly boost fertility in both men and women.
During pregnancy, your body needs extra vitamins to support your baby's growth and development. Pregnant women need 600 micrograms (mcg) of folic acid daily to reduce the risk of neural tube defects (problems with the development of the baby's brain and spine). They also need 770 mcg of vitamin A, 2.6 mcg of vitamin B12 and 600 international units (IU) of vitamin D.