Excretory System6th Grade Science

I. Functions

A. Remove wastes from body1. Excess Water2. Remove urea (protein)

II. Parts

A. Kidney1. Nephron

i. 1 millionii. All fluids out

a. 180 Litersiii. Retrieve goodiv. Remainder urine

B. Ureter

1. Deliver Urine to Bladder

C. Urinary Bladder

1. Storage of urine

D. Urethra

1. Different for male and femalei. Female

a. Size = 4 cmb. Close to vagina and anus

1. 50 times more likely to get urinary infectionii. Male

a. Size = 20 cmb. Through penis

III. Disease

A. Diabetes1. Means sweet urine2. Numbers 44,000 per day3. Lack of insulin to store glucose4. Premature aging5. Overweight/Lack of exercise6. Two types

B. Urinary Infection

1. Bacteria enter system2. Prune juice to prevent bacteria travel3. Lots of fluids to flush out4. Antibiotics to kill germs5. Life threatening if not treated

C. Kidney Stones

1. Calcium accumulation2. Lack of water3. Pass stone

D. Kidney Failure

1. Use machine to clean blood2. Frequent use required3. Kidney transplant