Which of the following toxins are absorbed through the lungs?

Toxins that are absorbed through the lungs are referred to as inhaled toxins. When substances are inhaled, they enter the respiratory system and can quickly be absorbed into the bloodstream due to the high surface area and rich blood supply of the lung tissues. This route of exposure allows for a rapid onset of effects, making inhaled toxins particularly dangerous in certain situations, such as during a fire or chemical spill.

The correct answer highlights this critical aspect of toxin exposure. Inhaled toxins can include a variety of harmful substances, such as smoke, gases, and particulate matter, which can lead to respiratory issues and other systemic effects.

In contrast, the other types of toxins mentioned do not involve absorption through the lungs. Absorbed toxins typically refer to those taken up through the skin or membranes, injected toxins involve direct entry into the bloodstream through a syringe or similar tool, and ingested toxins are consumed through the mouth and absorbed in the digestive tract. Each of these methods of exposure has its unique pathway and implications for toxicity, reinforcing the significance of understanding the characteristics of inhaled toxins in the context of firefighting and emergency response.