Answer:
Breathing involves inhale of oxygen from the atmosphere into the lungs and exhale of carbon dioxide from the lungs into the atmosphere ; whereas cellular respiration involves breakdown of glucose into carbon dioxide and water in living cells, releasing energy.
Explanation:
Brainliest please?
Answer:
He should target an intensity of about 110 bpm. It is bad for Max to exercise at his max heart rate for an extended period of time because it raises the risk of him having a heart attack.
Explanation:
Hope this Helps! :)
Answer:
1920s and 1930s,
Explanation:
it's worth reiterating that helmets were not mandatory. That wouldn't happen until 1943. During the 1920s and 1930s, variations of the leather helmet appeared, but in 1939, the game changed –or at least became safer– when John T. Riddel introduced the first plastic helmet