1. Digestion
The digestive process contains many different steps that take place in many different organs Human digestion, or the change that food undergoes in the digestive system, takes place in a long tube like canal called the alimentary canal, or the digestive tract. ... The pores in the ileum are slightly bigger than those in the jejunum and allow vitamin B12, vitamins dissolved in fatty liquids, electrolytes, bile salts and water to soak through the walls and into the blood stream. ... They are therefore specific in the reactions that they catalyse - one enzyme will react with molecules of one s...
- Word Count: 1971
- Approx Pages: 8
- Has Bibliography
- Grade Level: High School