Question

1.
Fill in the blanks:
(a) The length of the whole digestive tract is
metres.
(b) The stomach secretes
which is used to break down food.
(c) When hungry, the small intestine makes gurgling and rumbling sound
called
(d) The total length of blood vessels is nearly
kilometres.
(e) RBC acts as a source of
to different parts of the body.​

Answer 1

Answer:

1. about 9 meters

2. hydrochloric acid, and digestive enzymes.

3. That's because when the muscles in your digestive system move food, liquid, and gas through your stomach and small intestine, it produces a rumbling sound.

4. 100,000 kilometers

5. The main job of red blood cells, or erythrocytes, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs. Hemoglobin (Hgb) is an important protein in the red blood cells that carries oxygen from the lungs to all parts of our body.

hope it will help u ❤️

Answer 2

Answer:

(a) . about 9 meters

(b). pepsin

(c). preistalsis

(d). 100,000 kilometers

(e). not sure