What is the lower respiratory system?

the major passages and structure of the lower repiratory tract include the windpipe (trachea) and within the lungs the bronchi,bronchioles and alveoli

Explanation:

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The group of organs and tissues of the respiratory system that reside in the chest.

Explanation:

edge 2021 biology assignment

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

the answer is d.) homologous; have mammary glands