Final Answer:
The blood takes in various useful substances from the intestine, primarily through the process of absorption.
Step-by-step explanation:
One crucial substance is nutrients. After the digestion of food in the stomach and small intestine, nutrients such as glucose, amino acids, fatty acids, vitamins, and minerals are absorbed into the bloodstream.
These nutrients are essential for various physiological functions, providing energy, supporting growth and repair, and maintaining overall health. The absorption of nutrients occurs through the walls of the small intestine, facilitated by specialized transport mechanisms.
Once absorbed, these substances are transported by the blood to various tissues and organs, where they participate in metabolic processes and contribute to the body's functioning.