Basically the main function of both of these has to do with blood. Arteries are important because they move blood away from the heart. Veins do the opposite of arteries and actually return blood back to the heart! They are both very important for the body.
Answer:
A goes to the 3rd one and B goes to the second one
Explanation:
Your body can then produce the most effective weapons against the invaders, which may be bacteria, viruses or parasites. Other types of T-cells recognise and kill virus-infectedcells directly. Some help B-cells to make antibodies, which circulate and bind to antigens. A T-cell (orange) killing a cancer cell (mauve).
