The respiratory system<span> gives oxygen to the body's cells while removing carbon dioxide</span>
Answer:
1. physical fitness
2. circulatory system
3. regular exercise
4. internal system
5. flexibility
6. limiting factors
Explanation
im almost positive these are the answers if i remember correctly from my health class
The evidence to support this is simply the existence of the Precambrian time period which is when the life on Earth was at a high percentage of just starting out. This time covers about 88 percent of the history of the Earth when it comes to the different forms of life that happened during this time. It was the prime for evolution.
Galen was the originator of the experimental method in medical investigation, and throughout his life dissected animals in his quest to understand how the body functions. Galen was influenced by Hippocrates's idea of the Four Humours (the theory that the body was made up of four liquids, and He developed this by introducing the idea of using opposites to treat illnesses.
