Biology - Absorption from the large intestine
Absorption from the large intestine
In humans the material entering the caecum  has a high water content.
It also contains substances that cannot be chemically digested. As the
material slowly moves along the large intestine by peristalsis,  the
majority of water is absorbed out of the material into the wall of the
intestine to the blood supply.
If the water was not absorbed in the large intestine a large amount of
water would be lost in the faeces.  This could result in the person
Within the colon  of humans are bacteria that synthesise (form)
vitamins. For example, _Escherichia coli (E. coli). _synthesises Vitamin K.
The vitamins, along with water, and are absorbed across the walls of the
Material remains in the colons for 12 - 24 hours before it moves into the
last part of the large intestine, the Faeces are normally only stored
briefly in the rectum  before they are removed from the body via the