CalderonScience The excretory system

1. The Excretory System
BY: RILEY QUINN AND BROOKS KIRBY

2. Functions
 Collects and eliminates waste from the body.
 Regulates the level of fluid in the body.

3. Major Parts/Organs
 Kidney- the bean shaped organ that filters or
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removes wastes from the blood.
Nephrons- Networks of capillaries and small
tubes, or tubules, where filtration or blood occurs.
Ureter- urine leaves each kidney through a tube.
Bladder- a muscular sac that holds urine until the
urine is excreted.
Urethra- Urine leaves the bladder through a tube.

4. Interactions with Different Systems
 The digestive system collects and removes
undigested solids from the foods you eat.
 The Integumentary system, which includes the skin,
secretes, excess salts and water through sweat
glands.

5. Role in Maintaining Homeostasis
 The excretory System filters waste from the
blood, removes waste from the digestive system, and
interacts with the Nervous System.

6. Health and Diseases
 Kidney Disease- the nephons are damaged and the
ability of the kidneys to filter blood is reduced.
However, a person can have the beginning stages of
kidney disease and experience no symptoms.
 Kidney Stones- Kidney store a solids substances that
form in the kidney. The most common type is made
of calcium, stones that pass through the urinary
system can be very painful.

7. FAQs

8. How many filtration stages are there in the
Kidney when filtering blood?
A. 7
B. 12
C. 1
D. 2

9. What are the circular muscles in the urethra
called?
A. Sphincters
B. Ureter
C. Kidney
D. Villi

10. How many nephrons does each kidney contain?
A. 5,000
B. 700
C. 1,000,000
D. 3,000,000