music_addict_heart
i love your pfp!!
music_addict_heart
@aslytherinfa123n UHHH i think the heart is also involved with the respiratory system? because it pumps the blood to the lungs, which expel carbon dioxide and put in the oxygen you breathe in into the blood
aslytherinfa123n
@music_addict_heart EVERYTHING MAN. LIKE. HOW DOES THE RESPIRATORY SYSTEM WORK. AND LIKE HOW AND WHY WE NEED THE BRONCHUS.
