Human Excretory System Worksheet | PDF | Kidney | Urinary System - Free Printable

Worksheet: Human Excretory System

#### Q.1. What is the main function of the excretory system?
- Options:
a) Hormone production
b) Transporting oxygen to the tissues
c) Removal of waste and extra fluid
d) Gas exchange

- Correct Answer:
c) Removal of waste and extra fluid

- Explanation:
The primary function of the excretory system is to remove waste products (such as urea, uric acid, and excess salts) and excess water from the body. This helps maintain homeostasis by regulating the internal environment.

---

#### Q.2. What is the basic unit of the human kidney?
- Options:
a) Alveoli
b) Neuron
c) Trachea
d) Nephron

- Correct Answer:
d) Nephron

- Explanation:
The nephron is the functional unit of the kidney responsible for filtering blood, reabsorbing essential substances, and producing urine. Alveoli are found in the lungs, neurons are part of the nervous system, and the trachea is part of the respiratory system.

---

#### Q.3. Label the parts of the human excretory system on the diagram below.
- Parts to label:
- Urethra
- Ureters
- Urinary bladder
- Kidney

- Diagram Labels:
- Top left box: Kidney
- Middle left box: Ureters
- Bottom left box: Urinary bladder
- Right box: Urethra

- Explanation:
- Kidney: Filters blood and produces urine.
- Ureters: Tubes that transport urine from the kidneys to the urinary bladder.
- Urinary bladder: Stores urine until it is expelled from the body.
- Urethra: Tube through which urine exits the body.

---

#### Q.4. Which of the following organ transports urine from the kidneys to the bladder?
- Options:
a) Ureter
b) Liver
c) Urethra
d) Lung

- Correct Answer:
a) Ureter

- Explanation:
The ureters are tubes that carry urine from the kidneys to the urinary bladder. The liver is part of the digestive system, the urethra is the tube through which urine exits the body, and the lungs are part of the respiratory system.

---

#### Q.5. Which of the following organ stores urine before it is removed from the body?
- Options:
a) Ureter
b) Kidney
c) Urethra
d) Urinary bladder

- Correct Answer:
d) Urinary bladder

- Explanation:
The urinary bladder is a muscular sac that temporarily stores urine until it is expelled from the body. The ureter transports urine, the kidney filters blood, and the urethra is the exit tube.

---

#### Q.6. Urine exits the body through a tube called _______.
- Options:
a) Ureter
b) Kidney
c) Urethra
d) Urinary bladder

- Correct Answer:
c) Urethra

- Explanation:
The urethra is the tube through which urine exits the body. The ureter transports urine from the kidneys to the bladder, the kidney filters blood, and the urinary bladder stores urine.

---

Final Answers:

1. c) Removal of waste and extra fluid
2. d) Nephron
3. Labels:
- Top left: Kidney
- Middle left: Ureters
- Bottom left: Urinary bladder
- Right: Urethra
4. a) Ureter
5. d) Urinary bladder
6. c) Urethra

Boxed Final Answer:
\boxed{c, d, \text{Kidney, Ureters, Urinary bladder, Urethra}, a, d, c}