7th grade Science Chapter 15 lesson 3

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Across
  1. 3. system: collects and eliminates wastes from the body and regulates the level of fluid in the body.
  2. 4. tube by which the urine leaves the bladder
  3. 6. when waste products are filtered from the blood as it passes through the kidneys and produces this liquid.
  4. 7. circular muscles that control the release of urine.
  5. 8. tube by which the waste leaves the kidneys and drain into the bladder.
Down
  1. 1. muscular sac that hold urine until the urine is excreted and can expand and contract like a balloon.
  2. 2. networks of capillaries and small tubes, or tubules, where filtration of blood occurs. There are about one million nephrons.
  3. 5. bean-shaped organ that filters, or removes, wastes from the blood.