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Urinary System.
Question | Answer |
---|---|
How many kidneys are there? | 2 |
How many ureters are there? | 2 |
What are the 4 functions of the urinary system? | 1) removes waste 2) regulates body chemicals 3) secretes hormones 4) maintains a balanced PH level. |
What are the most important excretory organs in the body? | The kidneys |
What do the kidneys do? | filter out wastes to be excreted in the urine, regulate blood pressure, regulate acid base balance, stimulate red blood cell production |
What happens when the kidney fails and your body retains the fluids? | blood pressure rises, Harmful wastes build up in your body, your body doesnt make enough red blood cells, you develop fatigue, nausea, and loss of appetite |
What does the kidney resemble? | A bean |
What happens during the 2nd step of urine formation, tubular reabsorption? | water,suger, and salt are returned to the blood stream |
what happens during the 3rd step of urine formation, tubular secretion? | substance move out of the blood and into the renal tebules |
What is the 1st step of urine formation? | glomerular flitration |
Outermost layer of the kidney? | cortex |
Middle layer of the kidney? | medulla |
What does the medulla divide into? | renal pyramids |
There are millions of nephrons in which layer of the kidney? | cortex |
What is the functional unit of the kidney? | The nephron |
What does the nephron do? | Forms urine |
What is the bowmans capsule? | Cup shaped structure surrounding the glomerulus |
What is the glomerulus? | Ball shaped coil of capillaries |
What do the Ureters do? | Take urine by wavelike contractions to the bladder |
What is the bladder? | A hollow, triangle shaped muscular sac that serves as the resevoir for urine. |
How much urine can the bladder hold? | Up to 1 quart |
What is the urethra | The tube that leads from the bladder to the outside of the body |
How long is the urethra in women? | 1-2 inches |
How long is the urethra in men? | 7-8 inches |
What is the average amount of urine excreted in one day? | 2 quarts |
What is the urine composed of? | 95% water and 5% waste |