Where abouts in the body does most absorption take place?

Question

Hi I am doing a biology home study course and we have a mini test, one of the questions is 'where does absorption of food mainly occur from' with possible answers of duodenum, jejunum, colon or stomach. all my text books refer to the small intestines being the primary place where absorption takes place but I can't seem to find out if most occurs in the Duodenum or Jejunum. Any help would be really appreciated. thanks

Answer 1

the most active place for absorption is jejunum.
it's not the colon of course because it's part of large intestin and not stomach because it's digestive part and not absorptive.
although duodenum is also part of small intestin but duodenum and jejunum have differant anatomy.
the jejunum have more muccosal folds inside with thick muscular walls in order to be more activ even more than ileum.
hope this helps

Answer 2

if u ve a option of ileum in ur choice my answer would be that,if dont ve the choice then the answer is jejunum.

small intestine is divided into 3 parts

duodenum 25 cm (9.84 in) in length
jejunum 2.5 m (8.2 ft)
ileum 3.5 m (11.5 ft)

The duodenum: it is largely responsible for the breakdown of food in the small intestine. Brunner's glands, which secrete mucus, are found in the duodenum.

jejunum:The inner surface of the jejunum, its mucous membrane, is covered in projections called villi, which increase the surface area of tissue available to absorb nutrients from the gut contents. The villi in the jejunum are much longer than in the duodenum or ileum.


ileum:Its function is to absorb the products of digestion. The wall itself is made up of folds, each of which has many tiny finger-like projections known as villi, on its surface. In turn, the epithelial cells which line these villi possess even larger numbers of microvilli. Therefore the ileum has an extremely large surface area both for the adsorption (attachment) of enzyme molecules and for the absorption of products of digestion. The cells that line the ileum contain the protease and carbohydrase enzymes responsible for the final stages of protein and carbohydrate digestion. These enzymes are present in the cytoplasm of the epithelial cells. The villi contain large numbers of capillaries which take the amino acids and glucose produced by digestion to the hepatic portal vein and the liver.

Answer 3

Perhaps this physician knows something that I don't. I am not a medical professional and can only talk in generalities, but I do know that iron is plentiful in leafy green vegetables. Kale and collards are especially rich in protein, iron, and calcium. Iron deficiency is the most common nutrient deficiency in the United States. The calcium in spinach is not readily accessible. Regardless, you should eat a large salad of leafy greens every day. (Don't use too much oil on your salads) Every day, I use a 2HP blender to create a green smoothie with kale and fruit. It is true that meat provides readily accessible nutrients and iron and protein. However, the overwhelming majority of nutrition experts suggest that it is healthier for humans to consume plant based diets rich in the following foods: + Leafy green vegetables + Colorful vegetables (raw and cooked) + Legumes (peas, lentils, beans) + Nuts and seeds (ground flax seed provides essential Omega-3 fatty acids) + B12 and D (as needed) A small quantity of meat will not hurt you. It's the huge excess of animal protein in the standard American diet that is killing us through cardiovascular disease, cancers, stroke, and diabetes. Start eating a large quantity of leafy greens. Eat some meat as recommended by your physician to increase your iron. This doesn't mean you need to eat a one pound steak each day!

Answer 4

jejunum/ small intestine the duodenum is not large enough for complete absorption

Answer 5

It takes place in the small intestine in the dodenum with the help of villi

Answer 6

jejunum

Answer 7

small intestine, in stomach.