Answer:when you cough blood leaves your heart.
Explanation: I saw a video and when some one coughed blood came out of the heart.
I’m going to say a motorcycle
You’re correct in my opinion they all seem to be contamination
The main factor that controls the rate of breathing is..
A.) concentration of carbon dioxide.
If we think about it.. When we breath in oxygen, right away it enters your lungs and turns into carbon dioxide. Well since your lungs need to process oxygen and bring oxygen into the blood stream. Then as soon as the oxygen comes inside (inhale) the oxygen turns into carbon dioxide and you breath it out (exhale) to get a new oxygen load.
Makes sense? lol
Good Luck! :)
Answer:
d
Explanation:
cancer is examined by a doctor and they use needles and take sample of the cancer that is growing they then predict if you need treatment or not some people have cancer on there thyroid and in some cases may not even be cancerous
