Every human being does have a slightly different genetic potential regarding building up of muscle fibres. You can compare 2 people (not essentially bodybuilders!), let them train, rest, eat etc. exactly the same, but one will get stronger and the other one not. This is due to the genes and body composition.
yes
This large, muscular sac is called the stomach.
No,it is not
Genetics.
Genetics shape us in many ways including our potential to excel in sports. Training, diet, and other factors play a large role in developing our potential, but our genes may also limit performance. You may have the genetic potential for being a champion athlete, but if you live a lifestyle of overeating and no exercise you are unlikely to achieve that potential. On the other hand, someone with limited genetic potential can find ways to compensate and become a solid performer. Genetics have a large influence over strength, muscle size and muscle fiber compostion(fast or slow twitch), anaerobic threshold, lung capacity, flexibility, and, to some extent, endurance. Soo you are more likely to be born with it.
genetics and diet
GENETICS
Genetics. Not Genetics! She is a cartoon, she is just drawn that way.
muscular and large
rectum
The diaphragm
Cloaca