What are 2 examples of vertical communication

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

What do you do if you fall over and bend your big toe all the way forwards?

Now think of ways in which using healthcare services effectively can foster your health and ways in which not being aware of them is a health risk