Final answer:
The main entry points for fumes and gases into the body are through the nose and mouth via inhalation.
Step-by-step explanation:
Fumes and gases primarily enter the body through the respiratory system, which includes both the nose and mouth. These are the two main entry points for inhaled substances. When air enters through the nose, it passes through the nasal cavity where mucus and hairs trap particles. Additionally, certain chemicals can be absorbed if they come into contact with the skin or eyes, although this is not the primary route for gases and fumes, which are typically inhaled.