Main article: Cell membrane. The cell membrane, or plasma membrane, is a biological membrane that surrounds the cytoplasm of a cell. In animals, the plasma membrane is the outer boundary of the cell, while in plants and prokaryotes it is usually covered by a cell wall.
Egypt lies between the Red Sea to the east and the Mediterranean Sea to the north. The Red Sea is a narrow, landlocked sea that separates Africa from the Arabian Peninsula. It links to the Mediterranean through the Gulf of Suez and the Suez Canal.
However, in the north Mediterranean Sea lies and in the east Red Sea lies. Cairo is the capital city of the Egypt and it is also much dense populated city; the region is - Cairo lies on the Bank of world's longest river Nile.