What is the blood with used food particles?

The blood containing used food particles is primarily the chyme, a semi-liquid mixture of partially digested food and digestive secretions. After food is broken down in the stomach and small intestine, it is absorbed into the bloodstream, where nutrients are transported to various cells in the body. The remaining waste products are eventually directed to the large intestine for further processing and elimination. In this context, "blood" might be a misunderstanding, as it doesn't literally carry food particles but rather the nutrients derived from food.