It's not clear what causes most bone cancers. Doctors know bone cancer
begins as an error in a cell's DNA. The error tells the cell to grow and
divide in an uncontrolled way. These cells go on living, rather than
dying at a set time. The accumulating mutated cells form a mass
that can spread to other areas of the body.
Answer:
about stomach
Explanation:
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach. The stomach muscles contract periodically, churning food to enhance digestion. The pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.
I think the answer for 10 is the first choice and for 11 it should be the first choice also. Hope I helped.
Evaluating your fitness level before, during, and after, shows you progress throughout the fitness program.
