As we know the immune system is a complex of cells, tissues, and organs working together to avoid disease, now there are several types of defense, the most simple and first to act are physical barriers like skin or hairs, this stop physically the advance of pathogens, therefore we can say that the correct answer is option C.
Maybe by its weak because of their activities which they regurly or rarely do
it's difficult to cure because there are so many varying strains that are slightly different
Answer:
D. it allows our cells to dissolve without having to exert energy
Explanation:
Phospholipids being insoluble in water is so important because it allows our cells to dissolve without having to exert energy.
