Most of the foodstuff broken down by the digestive system is absorbed in the small intestine by villi, small appendage-like extensions that line the tracts of the small intestine. Blood vessels run through the villi, and their walls are made to be absorbent for broken down food.
The digestive system prepares food for the bloodstream. The digestive system absorbs food particles and nutrients pass through this system to the bloodstream.
Large intestine
This is an example of absorption, which is the process by which nutrients and other molecules pass through the walls of the digestive system and into the bloodstream or lymphatic system to be used by cells in the body.
Technically speaking, the point at which nutrients pass from the small intestine into the bloodstream is the moment they are officially inside the body.
The Digestive Tract
Anything that can't be absorbed by the gut into the bloodstream will continue on its journey through the digestive system. This includes roughage. Eventually, the undigested material will pass out as faeces.
The fetus is supplied with oxygen and nutrients through the placenta, which is connected to the mother's uterine wall. The mother's blood passes through the placenta, allowing oxygen and nutrients to pass from the mother's bloodstream to the fetus. Waste products from the fetus also pass through the placenta into the mother's bloodstream for elimination.
Correct. The amino acid molecules are absorbed and allowed to pass to the bloodstream.
Yes, it is possible for alcohol to pass directly from the mouth or stomach into the bloodstream. This can be made possible if you have an open wound, like a cut, in those areas.
Through the villi in the small intestine
The placenta is the organ that allows nutrients to pass between the mother and embryo. It is connected to the uterus wall and facilitates the exchange of oxygen, nutrients, and waste products between the mother's bloodstream and the developing fetus.
Osteocytes in the outer lamellae of an osteon typically communicate with neighboring cells through gap junctions and pass their waste products such as calcium ions to nearby osteoclasts or osteoblasts, which help in their removal via the bloodstream.