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.
Photo: Naval Surface Forces. Artificial waterway in Egypt, connecting the Mediterranean Sea to Gulf of Suez, and then to the Red Sea. The canal is 163 km long, and its width varies, and 60 metres at its narrowest. Along most of the length, there is only one lane for traffic available, though there are a handful of passing bays.