1. 1.Describe the role of the teeth in digestion. 2.How are saliva and stomach acid similar in their role of digestion? 3.A virus attacks a healthy cell. The cell immediately dies. What viral invasion did this virus exhibit? How do you know? 5/4 Daily Catalyst Pg. 66 Excretory System

2. 1.Describe the role of the teeth in digestion. 1.The teeth are involved in mechanical digestion and the crushing of food into a bolus. 2.How are saliva and stomach acid similar in their role of digestion? 1.Both saliva and stomach acid are examples of chemical digestion. 3.A virus attacks a healthy cell. The cell immediately dies. What viral invasion did this virus exhibit? How do you know? 1.The viral invasion is lytic because in the lytic cycle, the host cell will immediately die after viral invasion. 5/4 Daily Catalyst Pg. 66 Excretory System

3.  Public health campaign presentations  Human body test on Thursday  See me for tutoring  Review day on Wednesday  Extra credit: gloves, paper towels, hand sanitizer, tissues, band aids, pens, pencils, paper, red pens, tape, glue, and colored paper, markers, and, white board markers  Extra credit school play  May 1, 2, 9  ½ sheet review STAPLED to your ticket  All make up work is due Monday, May 11th 5/4 Class Business Pg. 66 Excretory System

4.  What is the difference between Mrs. Ireland’s class and a kidney stone?  A kidney stone is easier to pass. Brain Teaser

5.  Daily Catalyst  Class business  Objective  Excretory Notes  Practice Time  Work Time  Homework: excretory system assignment 5/4 Agenda Pg. 66 Excretory System

6.  How does the digestive system maintain homeostasis? Digestive System Review Take 1 minute to answer this question with your classmates.

7.  Today, we will describe the excretory system and trace urine as it moves through the body.  CCSS- Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or relevant technical context. 5/4 Objective

8.  https://www.youtube.com/watch?v=nJVbFIIycKo Filtration Demonstration

9.  How does the body maintain homeostasis?  How does the excretory system aid the body in maintaining homeostasis? Excretory System Essential Questions

10.  Key point #1: Function  To eliminate waste from the body  Liquid waste- urine What is the function of the excretory system?

11.  Key Point #2: Main organs  1. Skin  2. Kidney’s  3. Bladder Main Organs of the Excretory System

12. 1. Skin  Location: all over the body  Function: excretes extra water and salt in the form of ____________ ( ) 1. Skin Sweat is released out of your sweat glands PERSPIRATION SWEAT

13. 2. Kidneys  Location: lower back on either side of spinal cord  Function: filter blood and create urine 2. Kidneys I’m a kidney bean!

14.  Your kidneys are about the size of your fist.  Yes, you have two kidneys, but you can live with only one.  Every day, the two kidneys filter about 120 to 150 quarts of blood to produce about 1 to 2 quarts of urine, composed of wastes and extra fluid.  The 5-6 liters of blood in your body will be filtered by your kidneys up to 400 times per day Fun-Fast-Facts!

15. 3. Bladder  Location: the lower pelvis  Function: stores urine 3. Bladder

16.  Key Point #3: Importance/functions  Eliminate excess water and salts in your body  Maintain the pH of the blood  Remove waste products from the blood  Control the amount of water in the blood The Excretory System- Why is this important?

17.  Key Point #4: Flow of waste renal artery  kidney  nephron  ureter  bladder  urethra Flow of waste

18.  The kidney is just not one large filter. It is made up of millions of tiny filters.  Key Point #5: Blood is cleaned (filtered) in small units of the kidneys called Where in the body does filtration actually occur? NEPHRONS

19. 1.Blood filled with waste enters the kidney through the renal artery (away from heart, behind the renal vein) 2.The nephrons remove urea, excess water, and other waste products from the blood 1.Urea: the major waste product in your blood 3.The clean, filtered blood leaves the kidney through the renal vein and returns to the heart 4.The urea leaves the kidneys through the ureter 5.Urea and water become urine Steps of blood filtration in the kidney

20.  The waste products travel down the ureter to the bladder Where does all the wastes go?

21.  These wastes are then stored in the bladder as  Eventually the wastes exit your body through the In the bladder… URINE URETHRA

22.  Blood must be cleaned (filtered)  Wastes in the blood follow this path  Renal artery  Kidney  nephron  Ureter  bladder  urethra Summary

23.  Describe the role of skin in maintaining homeostasis in therm0regulation and the excretory system. Stop and Jot

24.  Directions: Complete the excretory assignment in your packet. What is not finished in class is homework. Use your time efficiently!  Time: 15 minutes  Noise: 1 (with a partner) Work Time

25.  During presentations, we are respectful and silent! Presentations

26. 1. Which of the following best describes the word filtration? a)Adding good things to your blood b)Removing the bad things from your blood c)Separating red and white blood cells d)Cleaning urine before exiting your body Class Practice-class points

27. 2. What are the 3 main organs of the excretory system? Skin Kidney’s Bladder Class Practice-class points

28.  3. What is the tube called that takes urine from the bladder to outside the body?  Urethra Class Practice-class points

29.  4. Which of the following organs stores urine? a)Urethra b)Ureter c) Bladder d) Kidney Class Practice-class points

30.  5. Which of the following organs actually filters your blood? Class Practice-class points A B C D

31.  6. Which of the following is not a waste product produced by your body? a)Oxygen b)Urea c)Carbon dioxide d)Salt Class Practice-class points

32.  How does the body maintain homeostasis?  How does the excretory system aid the body in maintaining homeostasis Can we answer our essential questions?