Which of these is a controllable risk factor of disease a:age b:nutrition c:poverty d:climate

Astructural difference between the trachea and esophagus that prevents the trachea from collapsing is the presence of: a) smooth muscle b) skeletal muscle c) respiratory cilia d) rings of cartilage

Which of the following is an important part of good posture? a. slumped shoulders b. arched back c. feet shoulder-width apart d. belly out

Explain what you know about the cause of mental illnesses.