Answer:
number one protein number two Epithelial tissue
Explanation:
In boys, the first puberty change is enlargement of the scrorum and testes. At this point, the penis does not enlarge.
As the testes and scrotum continue to grow, the penis grows.
The first growth of pubic hair produces long, soft hair that is only in a small area around the genitals.
This hair becomes darker and courser as it continues to spread.
The pubic hair eventually looks like adult hair, but in a smaller area. It may spread towards the thighs and up to the stomach.
Body size will increase, Voice changes, and they start producing sperm.
Answer:
1; The fact that your arm has two bones splits the energy in two, and each bone that snaps reduces the total energy of the force by a lot. The less energy is travelling through your body, the less damage your internal organs will receive. That's part of why they occur closer to the extremities.
Explanation:
2; The ribs are separate because if they were one solid plate and they'd get smashed and shoot shrapnels into your lung. ... If the bony thorax were solid instead of having gaps, you wouldn't be able to breathe because your lungs couldn't expand when they fill with air as the diaphragm descends.
Injuries,stress, irritation,burn, cramp
