George+and+Megan+Notes+period+3

Notes:

-Megan From: http://en.wikipedia.org/wiki/Excretory_system From: http://www.marymount.k12.ny.us/marynet/stwbwk02/frog/html/excretf.htm
 * excretory system excretes waste
 * responsible for getting rid of nitrogeneous waste products + non useful nitrogeneous materials
 * job- to take the toxins in the body and known as urea and turn it into urine
 * consists of 4 organs: kidneys, ureters, uretha, and the bladder.

- filter unneeded liquids from the blood - consists of toxin called urea or nitrogen - Urea: is a substance secreted by the liver, and removed from the blood by the kidneys. (www.wikipedia.com) - 2 different parts of kidney medulla and the cortex - medulla is the inner part of the kidney (all nutrients are reabsorbed into blood stream) - cortex is the outer part of the kidney (contains all the nephrons or microscopic filters) - drain urine from kidneys - release into bladder -The ureter has a diameter of about 3 millimeters, and the lumen is star-shaped. Like the bladder, it is lined with [|transitional epithelium], and contains layers of smooth muscle, thereby being under autonomic control. and contains layers of smooth muscle, thereby being under autonomic control. and contains layers of smooth muscle, thereby being under autonomic control. (http://www.wikipedia.com ) - passageway for releasing urine from the body - The transport tube leading from the bladder to discharge urine outside the body. In males, the urethra travels through the penis carrying urine. In females, the urethra is shorter than in the male and emerges above the vaginal opening (http://www.medterms.com) - muscle sac - stores urine until muscle relaxes George-
 * Kidneys:
 * Ureters:
 * Urethra:
 * Bladder:

How it Works notes.
 * Say with questions then the narator will answer it.
 * State a few facts after the question.
 * Show the process of how it works step by step.
 * Say what it needs to work right.
 * Say what it does to have to work right.
 * State a fact that not many people will know about.
 * End the show.