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Yes, not getting enough oxygen can and will make you drowsy, also, not getting enough oxygen can cause brain damage. - Heisenberg
Your not getting enough oxygen.
DEATH
Administer oxygen.
The Vein carying blood from the upper portion of the body into the heart, oxygen poor blood...
not enough oxygen is getting into your body
Right atrium receives de-oxygenated (without oxygen) blood from the superior and inferior vena cava. The superior vena cava brings blood from the top portion of the body mainly the neck, head etc. The inferior vena cava brings blood from the lower portion of the body like the abdomen, legs etc.
a drop of blood in the inferior vena cavsa is oxygen-rich or oxygen-poor?
The qualities of breathing are that you are living and that your getting enough oxygen and air.
All of the chemicals that you take in when you smoke goes to your lungs which makes it difficult to breath. If your not getting enough oxygen in then the baby won't have enough oxygen to survive.
Cyanosis means not getting enough oxygen, and that's dangerous for anybody.
Yawning is the body's tendency to get oxygen as fast as possible if your breathing does not supply your body enough. If you yawn too much, it means you are not getting enough oxygen through inhaling. Better consult a doctor for that. (: