You need to put the picture
Answer: alimentary canal
Explanation: The alimentary canal is the long tube of organs — including the esophagus, stomach, and intestines — that runs from the mouth to the anus
The answer is : increased resistance need to be added to the muscles.
Muscle conditioning refer to muscle strength and endurance. In order to improve it, you need to put your muscle in a harsher condition in a harsher condition than it used to be, so your muscle could adjust to it. That's why you should keep increasing the resistance
