Oxygen and carbon dioxide are the gases transported by the red blood cells. Oxygen is collected from the air in the alveoli to the blood capillaries. It binds to the heme group in <span>the haemoglobin<span>, which confers the red colour to the red blood cells where it is contained. </span></span>Carbon dioxide moves the other way around, from capillaries to alveoli. They are transported by the red blood cells when oxygen is exchanged by carbon dioxide from the cells' metabolism.
2,000 calories
hope this helps!
plz give brainliest answer!
<span>A barrier is anything that causes you to slip
up in your goal to make lifestyle changes, such as changing your eating
habits.Figuring out what those barriers are and how you can get
around them can help you reach your healthy eating goals.When you
hit a barrier, get support—from your family, friends, or
doctor.<span>Slip-ups are normal. Expect them, and have a plan for how
to get back </span></span>
It is (B) it is strange but it does weaken the immune system
