There are 3 major parts of the respiratory system: the airway, the lungs, and the muscles of respiration. The airway, which includes the nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles, carries air between the lungs and the body's exterior.
Endocrine system consist of endocrine glands that produces hormones. This hormones are carried by blood to their sites of function
B is correct the births exceed deaths
