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.
The Thames River has three main source branchesâthe North Thames, South Thames, and Middle Thames Rivers. These are also known as the North Branch, South Branch, and Middle Branch. The South Thames is the main stem Thames River and sometimes simply called the Thames.