2_2 Breathing Using complete sentences, explain how the muscular, skeletal, respiratory and circulatory systems work together to get oxygen from outside your body into your lungs.​

true                                                                                                       true true true true true true

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide