The part of the mammalian digestive system where absorption of nutrient takes place is the

The part of the mammalian digestive system where absorption of nutrients takes place is the ileum. The ileum is the final section of the small intestine and is located between the jejunum (the middle section of the small intestine) and the colon (the beginning of the large intestine). It is responsible for the absorption of nutrients, including vitamins, minerals, and other important molecules, from the digested food. The walls of the ileum are lined with millions of tiny finger-like projections called villi, which greatly increase the surface area available for absorption. The villi are covered in even smaller projections called microvilli, which further increase the surface area and help to absorb nutrients more efficiently. Once nutrients are absorbed into the walls of the ileum, they enter the bloodstream and are transported to the liver and then to the rest of the body, where they are used for energy and other functions. Therefore, the ileum is the part of the mammalian digestive system where absorption of nutrients takes place.