Page 20 - Ebook Digestive System Grade XI

enzyme components and raisins, nuts, nerves and
proteins; absorb kidneys, liver, bones,
iron element; Synthesis shellfish wounds on the
hormone-like substance; skin. Headache
maintain system functions dizziness,
nerve and blood chemistry lethargy, nausea,
the normal diarrhea.

6. Water
Water is a substance that is found around the environment. We certainly
use it daily, suitable for bathing, washing, cooking, or drinking. But unfortunately,
we only use it, not knowing its exact benefits. Every day, the water we consume
ranges from 2.5 liters. Water consumption is this amount because 70% of the
human body consists of water. Man in various conditions can live for a long time
without food. However, humans will not survive without water.
So important is water for our body; making water has a variety of
functions. The various functions of water are as follows.
a. As a medium for the occurrence of various chemical reactions in the body;
b. A means of transporting substances in the digestion of food from the small
intestine to other parts of the body;
c. A means of transporting metabolic waste from body tissues to excretory
organs for disposal;
d. Hormone transport devices from various glands to parts of the body that
needs it;
e. As an essential component in the lubrication of the bones of the joints,
digestion, and blood;
f. Needed for hydrolysis reactions in the digestive system;
g. It helps maintain body temperature
Next, to find out the content of substances in food, you check through the
Experiment rubric in groups.
NUTRITIONAL TESTS ON FOOD
A. Purpose
Identify the content of food substances contained in various foodstuffs
B. Tools and Materials
1. Foodstuffs: Rice, tofu, tempeh, raw bananas, cooked bananas, noodles,
bread, eggs,
2. milk, coconut oil
3. Test tubes and racks
4. Chemical Solution: CuSO4 . Fehling A, Fehling B, NaOh, Lugol
5. Lump and pestle

11