I think you meant element?
Then it is Krypton because it is in period 4 in group 18, the noble gases.
<span>There are three layers of meninges the dura mater, the arachoid mater, and the pia mater. The dura mater was the thick, opaque layer that had to be pulled back before dissecting. The pia mater is the thin, vascular layer that adheres to the surface of the brain. Weren't able to see the arachoid mater because of its transparency.</span>
When the moon compleatly covers the sun
Inner surface of the small intestine is not flat, but thrown into circular folds, which not only increase surface area, but aid in mixing the ingesta by acting as baffles. Villi: the mucosa forms multitudes of projections which protrude into the lumen and are covered with epithelial cells.