You can only use each organ only once

1)pancrease 2)rectum 3)salivary glands/liver

Explanation:

1)Lipase is an enzyme the body uses to break down fats in food so they can be absorbed in the intestines. Lipase is produced in the pancreas, mouth, and stomach.

2)Protease is present in gastric juice, stomach, intestine and digestive gland. Saliva and rectum contain traces of protease.

3)Physiology. Amylase is found in high concentration in the pancreas of virtually all animals. However, it is also found in the liver, salivary glands, and small intestinal mucosa of many species; the quantity of amylase in these organs varies considerably with different species

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: