The lungs have no skeletal muscles of their own. The work of breathing is done by the diaphragm, the muscles between the ribs (intercostal muscles), the muscles in the neck, and the abdominal muscles.
because malnutrition causes various health issues and diseases, lowers your immune system, and causes death.
This is the english version <span>How to solve the problem with water pollution?</span>
Answer: The answer is (D) usually made of tough fibers
Explanation: