It was proven that smoking increases your risk of cancer.
I think B but I maybe wrong please correct
Red blood cells play a huge part in the human body
Red blood cells transport oxygen throughout the body
They are able to carry oxygen because of an important protein called haemoglobin.
Not only does haemoglobin carry oxygen, but it's also responsible for the red color of our blood.
If red blood cells didn't contain haemoglobin the cells wouldn't be able to do their job properly. If this happens we would slowly die
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A neurotransmitter is defined as a chemical messenger that carries, boosts, and balances signals between neurons, or nerve cells, and other cells in the body. These chemical messengers can affect a wide variety of both physical and psychological functions including heart rate, sleep, appetite, mood, and fear. Billions of neurotransmitter molecules work constantly to keep our brains functioning, managing everything from our breathing to our heartbeat to our learning and concentration levels.