Hello there,
Digestion is the chemical breakdown of the food that we eat. The ingested food is converted into absorbable molecules. In other words, it is the breakdown of large insoluble food molecules into small water soluble food molecules so that they can be absorbed into the blood.

Absorption is the movement of nutrients, water and electrolytes from the lumen of the small intestine into the cell, and then into the blood. After the digestion of the food, absorption takes place.

Hope this answer helps you.
Thank you!!