The teeth, saliva, stomach, and small intestines are components of the digestive system. On the other hand, kidneys are part of the excretory system. They help filter out the waste products in the body, and regulate the body’s fluid and the blood’s pH.

E. kidney

A series of wave-like contractions along the smooth muscles of the esophagus is known as peristalsis. This movement allows the esophagus to push the food into the stomach.

C. muscle contractions

Hydrochloric acid is the body’s primary digestive fluid found in the stomach.

D. stomach

Kidneys play an essential role in maintaining homeostasis. These organs help filter out the waste products in the body and regulate the body’s fluid and the blood’s pH. Therefore, choice E is the correct answer. Releasing carbon dioxide is the responsibility of the respiratory system.

E. excretion of carbon dioxide

The digestive system works in breaking down the food into smaller or simpler components that the body can absorb and use in order to perform cellular processes.

A. break down large, insoluble molecules into smaller, soluble molecules

During filtration, harmless substances, toxins, and wastes are all removed from the blood.

D. filtration

The variable that is deliberately changed in the experiment is the temperature. This data is found on the second column of the table.

C. temperature

According to the table, the test tube that was placed under the temperature of 10 degrees Celsius has produced an amount of digestion at 3.0 mm. On the other hand, a test tube placed at 22 degrees Celsius has produced 4.5 mm. Therefore, if the test tube is placed at 15 degrees Celsius, the amount of digestion would range between 3.0 mm and 4.5 mm.

B. between 3.0 and 4.5 mm