Answer:
D. They refer to the heart and lungs
Explanation:
Cardio is a term used for the heart. When people talk about cardiovascular health they mean your heart and blood stream. Pulmonary talks about the lungs. This comes from the latin word Plumo which means lungs.
Answer:
A
Explanation:
kind of obvious but no hate
Proteins are large biomolecules and macromolecules that are comprised of one or more long chains of amino acid residues.
Answer:
Bacteria
Explanation:
An etiologic agent is a micro-organism that is capable of causing sicknesses and diseases
