What part did you need help understanding? Your definition is pretty strong- the epiglottis keeps food from entering the trachea and lungs. It also opens during breathing to allow air into the lungs. Good luck on your test, let me know if you need anymore refreshers!
9 calories of energy per gram.
Answer:
Muscles produce keratin so that hair can grow stronger. Sweat glands break down the food that is consumed. Muscles contract rapidly to produce heat on a cold day.
Explanation:
You subtract the number of protons and the mass to get the number of neutrons.
Answer: <span>Almost every type of bacteria has become stronger and less responsive to antibiotic treatment when it is really needed.
Hope this helps! :)</span>
