Question

Write a key point on cardio respiratory factors determining fitness.

Answer 1

1. Cardiovascular system - It consists of three parts: the heart, blood vessels and blood. Its major function is to deliver oxygen and nutrients, remove CO₂ and other metabolic waste products, transport hormones and other molecules, support thermoregulation and control of body fluid balance, and regulate immune function.
2. Respiratory system - The important parts of the respiratory system are the nose, nasal cavity, pharynx, larynx, trachea, bronchi, and lungs. Air can also enter the respiratory system through the oral cavity. Its major functions include transporting air to the lungs, exchanging gases (O₂ and CO₂) between the air and blood, and regulating blood pH.