The gel-like material within the cell membrane is referred to as the cytoplasm. It is a fluid matrix, the cytosol, which consists of 80% to 90% water, salts, organic molecules and many enzymes that catalyze reactions, along with dissolved substances such as proteins and nutrients.
The River Thames is the second longest river in the United Kingdom and the longest river entirely in England, rising at Thames Head in Gloucestershire, and flowing into the North Sea at the Thames Estuary.
Great Sand Sea. The Great Sand Sea is the pure sandy part of the Western Desert. It is an enormous and in many ways uncharted area, which forms a natural barrier between Egypt and Libya. This monotonous yet fabulous and extremely beautiful area extends from the south of Siwa almost 700 km until it reaches the foot of the Gilf Kebir.