If you take a walk for 20 mins how many steps do you think I would get in.

Describe some of the common health conditions associated with air pollution.

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

This is a negative reaction to food that doesn’t involve the immune system