Answer:
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.
Explanation:
Physical fitness is the ability of an individual to perform day to day activities without fatigue. It involves several aspects, including cardiovascular ability, muscular strength, and flexibility. Proper diet and sleep can help someone attain physical fitness, and physical fitness improves overall physical health.
Answer:
D-All of the above
Explanation:
I know for sure that B and C are right. Im not sure if A is correct though. But in order to add B and C you would have to click all of the above.