A) foods are physically broken down into smaller pieces!
your mouth brakes the food into small pieces and is the main part but chemical reaction also occurs,
the saliva in your mouth helps you swallow the food easily!
just imagine eating your food dry like doritos that will hurt! your saliva makes it a lot easier and painless!
True. The left side of the heart receives oxygenated blood from the pulmonary vein and pumps it into the aorta, while the right side of the heart receives deoxygenated blood from the vena cava and pumps it into the pulmonary vein.
Respiratory rate is measured by counting the number of breaths a person takes in a one-minute period. Since many factors can affect the results, understanding how to take an accurate measurement is very important.
The rate should be measured at rest, not after someone has been up and walking about. Being aware that your breaths are being counted can make the results inaccurate, as people often alter the way they breathe if they know it's being monitored.
Answer: Meal B is the most healthful choice
Answer:
Iron performs many important functions in the body. It is primarily involved in the transfer of oxygen from the lungs to tissues. However, iron also plays a role in metabolism as a component of some proteins and enzymes. Iron is toxic to the body in its free state.
Explanation:
