Here are the answers to your worksheet.
1. Labeling the Diagram
Looking at the diagram of the excretory system from top to bottom:
1.
Kidney: The bean-shaped organs at the top that filter the blood.
2.
Ureters: The long tubes connecting the kidneys to the bladder.
3.
Bladder: The balloon-like sac at the bottom that stores urine.
4.
Urethra: The tube at the very bottom where urine leaves the body.
*(Note: The instruction on the paper says "digestive system," but this is a typo. It is actually the
excretory or urinary system.)*
2. True or False Sentences
a) The function of the excretory system is expel waste from the body.
*
Answer: TRUE
* *Reasoning:* This is the main job of the system—to get rid of liquid waste (urine).
b) The ureters filter the blood and separate the waste and the water.
*
Answer: FALSE
* *Reasoning:* The
kidneys do the filtering. The ureters are just tubes that carry the urine down.
c) The combination of waste and water forms the ureter.
*
Answer: FALSE
* *Reasoning:* Waste mixed with water creates
urine. The ureter is the name of the tube, not the liquid.
d) The urine goes down two tubes called ureters.
*
Answer: TRUE
* *Reasoning:* There is one ureter for each kidney, so there are two tubes total carrying urine to the bladder.
e) When the kidney is full, your body tells you to go to the bathroom.
*
Answer: FALSE
* *Reasoning:* Your kidneys are always working; they don't fill up like a tank. It is the
bladder that fills up with urine and sends the signal to your brain when it needs to be emptied.
e) When the kidney is full, your body tells you to go to the bathroom.
*
Answer: FALSE
* *Reasoning:* The kidneys filter blood continuously. It is the
bladder that stores urine. When the bladder gets full, nerves send a signal to your brain telling you it's time to use the bathroom.
f) The bladder releases the urine through the urethra.
*
Answer: TRUE
* *Reasoning:* Once the bladder squeezes, the urine travels out of the body through the final tube called the urethra.
──────────────────────────────────────
Final Answer:
1. Diagram Labels (Top to Bottom):
* Kidney
* Ureters
* Bladder
* Urethra
2. True or False:
* a)
TRUE
* b)
FALSE
* c)
FALSE
* d)
TRUE
* e)
FALSE
* f)
TRUE
Parent Tip: Review the logic above to help your child master the concept of excretory system worksheet.
