How are wounds skin/mucous membranes susceptible to infection?

b) the heart is a pump made of muscle and that is difficult to grow in the lab.

there should be recorded video of the class under the assignments for the day

lifetime activities are certain actions that are either required throughout your life or you choose to do them. for example, eating is considered a lifetime activity, drinking water or other beverages, keeping your body clean, taking medicine. those types of actions are considered lifetime activities.