True or false
1. oxygen is absorbed into the bloodstream in the trachea?
2. the bronchial tubes branch off from the trachea like an upside-down letter y.

1) False. Oxygen is absorbed in the alveoli of the lungs

2) True. The bronchial tubes branch off into the lungs which then branch off into the smaller bronchi and even smaller bronchioles.

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide