Question

Air

lungs
carbon dioxide
hiccup
mouth
oxygen
trachea
yawn
diaphragm
sneeze
inhale
respiratory
bronchi
water vapor
blood
exhale
cough
pharynx
nose

All animals need ________________ to make energy from food. We get this oxygen from the _____________ that we breathe. In order to get the oxygen into the blood where it can be transported to the rest of the body, the air travels through a system of organs called the _______________ system. When you ________________, air enters the body through the _______________ or the ____________. From there it passes through the ______________, which forces air into the _______________ and food into the esophagus. The air travels down the trachea into two branching tubes called ________________ and then on into the ________________. In the lungs oxygen from the air enters the _______________. At the same time, the waste gas ____________________ leaves the blood and then leaves the body when you ___________________. Some __________________ also leaves the body when you exhale, which is why mirrors get foggy when you breathe on them. The ______________ is the muscle that controls the lungs. It is important to keep the respiratory system clear so oxygen can keep flowing into your body. If something gets in your nose and irritates it, you ___________________. If something gets in your trachea or bronchi and irritates it, you _________________. If something irritates your diaphragm, you _________________. Finally, if the brain thinks you are not getting enough oxygen, then it forces you to _________________.

Answer 1

All animals need oxygen to make energy from food. We get this oxygen from the air that we breathe. In order to get the oxygen into the blood where it can be transported to the rest of the body, the air travels through a system of organs called the respiratory system. When you inhale, air enters the body through the nose or the mouth. From there it passes through the pharynx, which forces air into the trachea and food into the esophagus. The air travels down the trachea into two branching tubes called bronchi and then on into the lungs. In the lungs oxygen from the air enters the blood. At the same time, the waste gas carbon dioxide leaves the blood and then leaves the body when you exhale. Some water vapor also leaves the body when you exhale, which is why mirrors get foggy when you breathe on them. The diaphragm is the muscle that controls the lungs. It is important to keep the respiratory system clear so oxygen can keep flowing into your body. If something gets in your nose and irritates it, you sneeze. If something gets in your trachea or bronchi and irritates it, you cough. If something irritates your diaphragm, you hiccup. Finally, if the brain thinks you are not getting enough oxygen, then it forces you to yawn.

-TheUnknownScientist 72