Question

hey friends help me with this question..
choose the best option​

Answer 1

Explanation:

Part 5 . Option D... Please mark me as branelest

Answer 2

Answer:

Q5) option D ( Pharynx comes before larynx )

Q6) option B ( alveoli are the main site of exchange of gases...and they are present inside the lungs .)

Q7) option A.( valves in the heart prevent the back flow of blood)

hope this helps u .

pls mark me as the brainliest.