Almost all absorption of nutrients occurs in the small intestine. The small intestine is divided into three parts: the duodenum, jejunum, and ileum, where various enzymes and bile aid in the breakdown of food. The walls of the small intestine are lined with villi and microvilli, which increase the surface area for maximum nutrient absorption into the bloodstream. While some absorption occurs in the stomach and large intestine, the small intestine is the primary site for nutrient uptake.
The small intestine, or the duodenum, is where most absorption of nutrients occur.
digestiv system
true
In the small intestine
cuz the stomach is a loser
small intestine
small intestine
Eighty percent of nutrient absorption occurs in the small intestine. The other 20% occurs in the stomach tissues.
Most of the absorption of nutrients occurs in the small intestine. The inner surface of the small intestine is lined with finger-like projections called villi, which increase the surface area available for absorption. This is where the majority of nutrients from food are absorbed into the bloodstream.
Filtration of the blood and re-absorption of nutrients primarily occur in the kidneys, specifically in the structures called nephrons. The nephrons filter the blood to remove waste products and then reabsorb essential nutrients, electrolytes, and water back into the bloodstream.
In the alimentary tract, starting in the mouth where salivary amylase starts digesting carbohydrates, down to the stomach and then the intestines. Along the way, various other organs are involved, eg the pancreas supplies insulin, the liver adds bile etc.
The ileum is long in order to facilitate absorption of nutrients from digested food. Its length provides a large surface area for nutrient absorption to occur efficiently. This is important for the body to extract as many nutrients as possible from the food we consume.