1. Chapter 5 Urine for a great time
Excretory System
Chapter 5
Urine for a great time

2. Excretion Sweating is a process of excretion….
When you get hot your body releases sweat to cool you down. TO balance this loss of water out less water is put into your urine.
The process by which excess water or wastes are removed from the body
Done by: Kidneys, Large Intestine, Skin, Lungs, and liver

3. The urinary system
Main Role is to filter waste products and excess water from the blood and excrete them from the body as urine

4. Kidneys Filter blood and form urine Nephrons role
More than a million of these

5. Formation of Urine
Blood enters the kidneys via artery which then travels into the capillaries
Filtering in the Nephron
Glomerulus filters the blood
Tubule collects the waste
Some fluid is reabsorbed

6. Urination: Excretion of Urine
After the kidneys the urine enters the two ureters to travel to the bladder
Muscular tubes that keep the urine flowing through peristalsis
Once the bladder is halfway full the sphincters release the urine into the urethra

7. Kidneys and homeostasis
They filter blood in the body many times each day and produce urine
They control the amount of water and dissolved substances in the blood
They secrete hormones that do the following
Stimulates bone marrow to produce red blood cells when more are needed
Regulates blood pressure and keeps it in a normal range

8. Kidney Health You only need one kidney to live a healthy life
Issues that can hinder the function of the kidneys are
Kidney stones
Infections
diabetes

9. Kidney Stones Mineral crystals that form in urine Very painful
May need to removed if the ureter is blocked

10. Infections Very common Urinary tract infection (UTI)
If left untreated can create a more serious issue

11. Diabetes and Dialysis
Untreated diabetes can damage the capillaries in the kidneys
Blood can no longer be filtered
Must get a kidney transplant
hemodialysis is a way to filter your blood

12. Diagram