What does the large intestine primarily do?

The large intestine primarily functions to remove water from the remaining indigestible food matter, which helps to form solid waste that can be expelled from the body. As the contents move through the large intestine, cells lining its walls absorb water and electrolytes, which contributes to the regulation of hydration and electrolyte balance in the body. This process is crucial in preventing dehydration and ensuring that waste is processed efficiently. The large intestine also plays a role in housing beneficial bacteria that further aid in the breakdown of waste and the absorption of certain nutrients, but its main role is focused on water reabsorption and waste formation.