EXCRETION

Structure and Function Lesson 1

Do Now Watch the video: Brain Pop - Urinary System and complete the multiple choice worksheetBrain Pop - Urinary System

The removal of the metabolic waste products produced by cells  CO2  H20  Nitrogen 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