Correct option is D
The correct answer is (d) respiratory.
· The trachea, also known as the windpipe, is a part of the respiratory system of the human body. It connects the larynx (voice box) to the bronchi of the lungs and allows the passage of air during breathing.
Information Booster:
· Excretory System : Involves organs like the kidneys and bladder, responsible for removing waste from the body.
· Cardiac System : Refers to the heart and blood vessels, responsible for blood circulation.
· Digestive System : Involves organs like the stomach and intestines, responsible for breaking down food and nutrient absorption.