Answer:
1 veins and arteries
2 plasma
3 because they contain hymoglobin which is red in colour
4 they carries oxygen around the body
5 lymphocyte : engulf pathogens and destroy them within
phagocytes : sends toxins that destroy pathogens where they are
6 red blood cells are bio concave to increase surface area for carrying oxygen whereas white blood cells some are free form shape especially lymphocytes to squeeze through capillaries in a way to where the pathogens are located
7 platelets are small blood components that helps in blood clotting to avoid the excessive bleeding