Molecule that makes up proteins, composed of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
a. nucleic acid
b. amino acid
c. steroid
d. chitin

What are some of the immune functions of the lymphatic system? a. cleaning red blood cells from the blood and creating lymph fluids b.transporting lymph to the tissues and creating lymph fluids c.removing infectious agents and making white blood cells d.making red blood cells and removing infectious agents