Do Now: Take out notebook, homework, and pencil Use the chemical below and describe EVERYTHING you know about it 4CO2 What is the difference between a molecule and a compound?

Do Now: Take out notebook, homework, and pencil What is the path that food takes through the digestive system? Pick THREE parts and explain what happens to the food there

Essential Questions: What is the main function of the excretory system? What are the main organs in this system? Engagement Video

Glue notes on page

Excretory System The main function is to filter blood and remove liquid waste from the body Works with the circulatory, respiratory, endocrine and integumentary systems to maintain homeostasis (balance) of water, blood pressure etc.

Kidney (2 in body) Main function is to filter waste products out of the blood Blood enters through renal arteries and passes back to circulation through the renal veins Helps endocrine system form red blood cells and the circulatory system to remove waste from blood Renal artery Renal vein

Ureters Muscular tubes that carry urine from kidneys to bladder 2 of them, one for each kidney

Bladder Pear shaped and holds urine Holds 400-600 mL (2.5 cups) Emptying of bladder takes place by contraction of smooth muscles

Urethra Passage way through which urine is discharged from the bladder out of the body Longer in the male than female About 1-1.5 liters per day

Quick Action – INB Template Excretory System INB Template 1. Label all of the organs on your template for the Excretory system Excretory System Function: Main Organs: © KeslerScience.com

Quick Action – Excretory System Do this on page Look at your drawing of the excretory system. It only has four parts. Come up with a quick mnemonic to help you remember the order of the organs beginning with the kidneys. mnemonic © KeslerScience.com

Accessory Organs Not part of the path of urine but play a part in removal of waste Liver- filters blood from the digestive tract Lungs- removes carbon dioxide when exhaled Skin- secretes a fluid waste called sweat

Symptoms of dehydration Excretory System Hydration Water makes up half of your body weight. You lose water when you go to the bathroom, sweat, and breathe. If you don’t replace the water you lose, you become dehydrated. Symptoms of dehydration Little or no urine, or urine that is darker than usual Sleepiness or fatigue Extreme thirst Headaches Confusion Dizziness © KeslerScience.com

Half of class will do reading activity You must read, answer, AND highlight/underline where you found your answer Other half will work on assessment sheet 7 mins and then we will switch

Creative Writing Assignment Start in class and finish for homework