How are nutrients absorbed into the bloodstream?

Nutrients are distributed to all tissues and organs through the blood, as this is the fastest way. Substances can enter the bloodstream only in a dissolved form. Large organic molecules cannot enter the vessels through the digestive system. The feeling of hunger and satiety arises due to the analysis of blood by the hypothalamus. This part of the brain analyzes the composition of the blood and makes you feel hungry when there is a lack of nutrients. Also, when a person is unable to eat on their own, doctors inject nutrients intravenously.