Please Define the Following Key Terms

question 37

Essay

Please define the following key terms. Show Who? What? Where? When? Why Important?
-Civilization and Its Discontents

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Definitions:

CO₂

Carbon dioxide, a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is absorbed by plants in photosynthesis.

O₂

The molecular form of oxygen that is essential for respiration in most living organisms.

Respiratory Irritant Receptors

Nerve receptors located in the respiratory tract that trigger coughing or sneezing when irritated by harmful substances.

Vagus Nerve

The tenth cranial nerve that controls the heart, lungs, and digestive tract, and plays a significant role in the parasympathetic nervous system.