EXCRETION
Jan 03, 2016
EXCRETION
Structure and Function
Lesson 1
Do Now
Watch the video: Brain Pop - Urinary System and complete the multiple choice worksheet
The removal of the metabolic waste products produced by cells CO2H20Nitrogen compounds/proteins
– (ammonia, urea, uric acid)Salts – NaCl
Regulated by nerves and hormones
Structures
Urinary System Skin
1. Urinary System:
Homeostasis maintaining a stable
internal environment: Fluid inside and around cells the regulation of chemicals in the blood is done by the kidney
Human Urinary System
2 Kidneys filter blood – remove wastes
1 artery brings blood to kidney
2 Ureters carries urine to bladder
1 Bladder urine storage
1 Urethra takes urine out of the body
Kidney maintain H20, maintains salt, maintain
blood pH, maintain blood volume, rids nitrogen waste
Nephron = function unit of the kidney (filters)
Feed back mechanism
= blood volume and H20 levels
increase urine production
will increase
Ex: if you sweat lose H20 blood volume decreases stimulates brain sends signal to kidney to keep more H20 less urine is made
Reabsorption
kidneys filter all the blood in the body approx. Every 45 minutes
99% of the water that enters the bowman’s capsule is reabsorbed into the blood
Urine formation All material that remains
after filtration and reabsorption is called urine
made up of urea, excess salts, and water
stored in the bladder until released from the body through the urethra
Homework
Excretion practice questions
Skin
Lesson 2
Do Now
Urinary System Vocabulary worksheet
2. Integumentary System
Skin Largest organ in the body! – sense organ surrounds protects (water proof) regulates fluid, salt and urea by sweat
3. Liver
Important in maintaining homeostasis, makes proteins
Makes bile Help digest fats Stores glucose and vitamins Detoxifies toxins: ex: alcohol Breaks down RBC’s Breaks down amino acids – urea
Disorders Gout Nephritis Kidney stones Kidney disease Kidney transplant
In class assignment
Review for test