what contains a system of blood vessels and tubules
clouds kidneys organ density lungs complex blood cells alveoli
A B C D E F G H
Each nephron contains a system of blood vessels and tubules.
kidneys contain  a system of blood vessels and tubules
what contains a system of blood vessels and tubules (A) clouds (B) kidneys (C) organ (D) density (E) lungs (F) complex (G) blood cells (H) alveoli