Biology Urinary System

Topics: Urinary bladder, Urinary system, Kidney, Urine, Muscle / Pages: 2 (397 words) / Published: May 2nd, 2014
Amal Farooqui
Per 2B
4/28/14

Unit 6 Objectives

1. -Regulate composition of blood: the kidneys afjut the composition and volume of blood and remove wastes from it. -Regulation of blood pH: The kidneys excrete a variable amount of H+ -Regulation of blood pressure: The kidneys help regulate blood pressure by secreting the enzyme renin, that causes and increase in blood pressure. -Contributions to metabolism: The kidneys help synthesize the hormone calcitriol.

2. Kidneys: the kidneys filter out wastes from the blood these wastes are then liquified into urine. Ureters: The ureters funnel the urine into the Urinary Bladder. Urinary Bladder: the urinary bladder stores the urine until muscle contraction forces the urine out. Urethra: the urethra is where the urine is forced out of the body.

3.

4. Renal Capsule: a smooth, transparent, fibrous membrane. Helps against trauma and maintains kidney shape. Adipose Capsule: a mass of fatty tissue surrounding the renal capsule. It also helps the kidney against trauma and keeps them in place in the abdominal cavity. Renal Fascia: a thin layer of dense irregular connective tissue that anchor the kidney its its surrounding structures on the abdominal wall.

5. The urinary bladder is a hollow, expandable, muscular organ located in the pelvic girdle. Although the shape of the bladder is spherical, its shape is altered by the pressures of surrounding organs. When it is empty, the inner walls of the bladder form folds. But as the bladder fills with urine, the walls become smoother. The internal floor of the bladder includes a triangular area called the trigone. The wall of the bladder consists of four bundles of smooth muscle fibers. These muscle fibers, interlaced, form the detrusor muscle and comprise what is called the internal urethral sphincter.
6. The ureters enter the bladder at sharp right angles because so that when it's filled the mucous lining

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