Question

how do humans respire?

Answer 1

HEY MATE HERE IS YOUR ANSWER:


When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.


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Answer 2

heya mate here is your answer

• as water and co2 are bi-produts of respiration.
• they should be excreted
• bloods cells are circulating by the tiny vessels near the lungs pick oxygen
• and it have to carry around the body to the places of respiration
• then the air is forced out from the lungs
• as the diaphragm bows upward