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Level 7

How Does the Excretory System Work?Fill in the blank with the correct term from the list below.

dialysis lungs ureterexcretion nephrons urethraexcretory system skin urinary bladderkidneys urea

1. The are the filtering units in the kidneys that filter the

blood.

2. Urine is stored in the until it can be removed from the body.

3. The process by which wastes are removed from the body is .

4. The tube that connects the kidney to the urinary bladder is the

.

5. When the kidneys can no longer efficiently filter waste and excess fluid from the body,

the process of can be used to help the person survive.

6. is a nitrogen waste that is removed in urine along with

water, minerals, and salt.

7. The is the group of organs that carries out excretion in

the body.

8. The are the organs that remove wastes and fluids from

the body.

9. The tube through which urine leaves the body is the .

10. Both the and the play a role in

the excretory system as well as in other systems of the body.

Chapter 7 • Lesson 2 Use with pp. 276–283 Lesson Support

Essential Question

KH_BD1_SJG7_U2C07L2_LS.indd 2 8/15/14 11:09 AM