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