.More than likely the arrow is pointing to a
LYSOSOME.Lysosomes are double membrane organelles produced by the Golgi Apparatus that contain enzymes that allow for foreign material to be dissolved when engulfed by the structure
Answer: Are special capillaries that supply nutrients to the walls of arteries and veins.
Genital warts is the obvious answer. if you want to find the answer yourself its on page 823 under the heading "sexually transmitted diseases".
The maintenance of an organisms internal environment within certain limits