Urinary/ExcretorySystem

B. Lane

SHS

Objectives• Explain the function of the excretory

organs• Describe the structure and function of the

organs in the urinary system• Explain how the kidneys regulate water

balance• List and describe some common disorders

of the urinary system

Functions of the Urinary System'sFunctions of the Urinary System'sFunctions of the Urinary System'sFunctions of the Urinary System's Waste collection (produce urine) - remove

substances from the blood, to form urine Waste removal (excrete urine) -after the urine

is produced it is excreted from the body

Regulation - electrolyte concentration, acid-base balance, amount of body fluids, and B/P

Aids RBC formation (erythropoiesis)

• 2 Kidneys2 Kidneys

• 2 Ureters2 Ureters

• 1 Bladder1 Bladder

• 1 Urethra1 Urethra

• 2 Kidneys2 Kidneys

• 2 Ureters2 Ureters

• 1 Bladder1 Bladder

• 1 Urethra1 Urethra

Protected by–Muscles

–Adipose tissue

–Abdominal organs

Bell WorkBell Work

•Draw and label the structures of the urinary system

Internal Structure of Kidney• Cortex• Medulla• Pyramid(s)• Papilla• Calyx• Pelvis

Nephron - Microscopic Structure

• Renal Corpuscle

• Renal Tubule

http://coe.fgcu.edu/faculty/greenep/kidney/nephron.html

1. Renal Corpuscle

* Bowman’s Capsule

* Glomerulus

2. Renal Tubule

* Proximal Convoluted Tubule

* Loop of Henle

* Distal Convoluted Tubule

* Collecting Tubule

Formation of Urine• Filtration - by the glomerulus

• Reabsorption - within the renal tubules

• Secretion - by the tubular cells

Assignment

• Read pages 456 to 463

• Answer review questions on workbook pages 200 to 201

• Label diagram workbook page 207