Which of the following are pathways for toxicants to enter into our body?

A) Inhalation

B) Absorption

C) Dermal

D) Ingestion

E) Extraction

Choose correct answer from the options given below:

The correct answer is A, C and D only.

Toxicants can enter the human body through specific routes of exposure. The primary pathways include:
1. Inhalation (A): Breathing in airborne toxicants such as gases, vapors, dusts, or fumes into the lungs.
2. Dermal (C): Absorption of toxicants directly through the skin upon contact.
3. Ingestion (D): Swallowing toxicants through contaminated food, drink, or hand-to-mouth contact, allowing them to enter the gastrointestinal tract.

In contrast, Absorption (B) is a general physiological process by which a substance crosses a biological membrane into the bloodstream rather than an external entry pathway itself. Extraction (E) is a separation process used in chemistry or industry and is not a biological pathway of exposure. Therefore, the valid pathways listed are Inhalation, Dermal, and Ingestion.