Lysozyme which is found in the lysosomes. They function at a relatively low pH and are so because if they functioned at physiological pH they would digest the cell. But in this case, they are in the lysosomes where they are safe and at a lower pH so when the vesicles open they can emit hydrogen ions and the lysozyme to digest the foreign material.
The immune system helps guard against infection, protect from UV radiation, and regulate body temperature.
Answer:
tunica media hope this helps
Africa is the only place where giraffes live in the wild