Answer:
Q3. T
Q4. T
Q5. F
Q6. T
Q7. F
Q8. F
Explanation:
Q3. Things like tearing, chewing, rolling, are all mechanical digestion. Things like enzymes breaking down food molecules are known as chemical digestion.
Q5. Most digestion actually takes place in the small intestine. Most of the enzymes that are used to break down food substances can be found here.
Q7. Arteries carry blood away from the heart, to all parts of the body. Veins are the ones that carry blood to the heart.
Q8. In the lungs, blood picks up oxygen and releases carbon dioxide, not the other way around. Humans need oxygen, so it makes no sense if our primary focus in the lungs is to give out oxygen and take in carbon dioxide.
