Which of these agents can be absorbed during the act of breathing?

Blood agents are a category of chemical agents that interfere with the body's ability to use oxygen. They can be absorbed into the body through inhalation during the act of breathing, leading to serious physiological effects. Common examples of blood agents include compounds like cyanide and carbon monoxide, which disrupt cellular respiration and can result in a rapid onset of symptoms that affect the brain and heart.

While choking agents, riot control agents, and incapacitating agents can also have significant effects when inhaled, the specific mechanism of action regarding blood agents is distinct because they primarily affect the blood's ability to transport oxygen. This makes understanding the specific dangers of blood agents crucial for recognizing their potential impact during exposure situations.