excretory system

Question 1

what does the excretory system do

Answer 1

• Eliminates waste and toxins from body
• Regulates blood volume/pressure/blood pH/produces urine, etc.

Question 2

organs in excretory system

Answer 2

• Skin (Sweat - removes excess salts/water/etc. + cools body)
• Lungs - carbon dioxide is released from here, which helps the regulation of CO2 in the blood
• Liver - converts toxic nitrogen-based cellular waste from protein breakdown into urea
• Kidneys - filters out wastes/excess water/urea/salts/other waste from the blood
  
  • Nephrons - processing units within the kidney that absorb valuable substances and get rid of waste in blood

Question 3

path of urine

Answer 3

1. Kidney - forms urine
2. Ureter
3. Bladder - urine storage
4. Urethra
5. Out the body

Question 4

maintaining homeostasis in the excretory system

Answer 4

• Kidneys control level of sodium and blood and helps control osmotic pressure of blood
• Regulate pH of blood by filtering
• Glucose – usually not filtered out of the blood by kidneys