They carry oxygen to your entire body, and carry carbon dioxide away from your body to be exhaled.
Answer:
1. E.coli
2. Intestinal tract
Explanation:
E.coli bacteria are useful to humans when they live in the large intestine of humans. The large intestine is an important digestive structure as it is important for the reabsorption of the nutrients.
The E.coli living in the intestine use the available digested nutrients and synthesises the vitamin B and K which are absorbed and utilised by the human body.
Thus, E.coli and Intestinal tract is correct.
Vascular systems are important to transport materials throughout the organism.
The cell's volume increases more rapidly.
Let's say you have a cube. When it's side have a length of one, the SA us 6 units while the volume is only one. By the time it's 10 by 10 by 10, the SA is 600 and the volume is 1,000.
