1. Jan. 30, 2018
You need:
Clean paper / Pencil
Paper guts - digestive
Warm Up:
Mental Math Quiz – be ready
I CAN: determine the parts/function of the excretory system

2. MRS NERG-C M - Movement R – Respirations
S – Sensitivity (responds to stimulus)
N – Nutrition / nutrients
E - Excretion
R – Reproduces
G - Growth
C - Cells

3. Body Organization
Organism
Organ System
Organ
Tissue
Cell

4. How are cells organized?
ORGANISM (BODY)
Complex living things are organized into 5 levels.
Cells carry on the processes that keep us alive.
Examples:
Red Blood Cells
Muscle Cells
Skin Cells
ORGAN SYSTEM
ORGANS
TISSUES
CELLS

5. Organs are organized into ORGAN SYSTEMS!
An ORGAN SYSTEM is a group of organs that work together to perform a major job.
Examples:
Circulatory System
Digestive System
Skeletal System
ORGAN SYSTEM
ORGANS
TISSUES
CELLS

6. What is HOMEOSTASIS?
HOMEOSTASIS is how your body maintains an INTERNAL BALANCE.
It keeps your body STABLE in spite of changes OUTSIDE YOUR BODY.

7. The Digestive System Mouth Esophagus Stomach Liver Rectum Pancreas
Gallbladder
Small intestine
Large intestine
Rectum
Pancreas

8. The Digestive System The digestive system has 3 main functions:
It breaks down food into particles that the body can use.
It absorbs nutrients into the blood.
It eliminates waste from the body.
Mouth
Esophagus

9. The Digestive System
Digestion can happen in two ways:
Mechanical digestion: foods are physically broken down into smaller parts (like by teeth).
Chemical digestion: Chemicals called ENZYMES break foods into their smaller “building blocks” (for example, starch gets broken down into sugar).
Mouth
Esophagus

15. We did not actually begin the excretory system today!
Jan. 30, 2018

16. Excretory System
Fluid’s

17. Main Function:
The system of the body that collects waste produced by cells and removes the wastes from the body. (also known as: excretion)

18. Wastes Eliminated:
It specifically removes Urea – chemicals that come from the break down of proteins
Excess water
Other wastes

19. The path of the excretory system
Kidneys – filter blood
Ureters – narrow tubes that leading from the kidneys to the bladder
Urinary Bladder-fist sized pouch (muscular sac) that holds about 2 cups of urine
Urethra – exit tube

20. The Kidneys and their Nephrons
The kidneys are made of millions of nephrons, tiny filter factories.
First, the wastes and the needed materials, like glucose and water, are filtered out of blood
Second, the needed materials are returned to the blood and wastes are eliminated.

21. Nephrons Capillaries Capillaries Urea
Check page 427 in the green book. Write out 1-5.
Capillaries
Capillaries
Urea
Urea, water, glucose, and other materials…
water, glucose
Kidney

22. After the reabsorbing process is complete, the liquid that remains in the tube is called… URINE.

23. What happens in the Nephrons?
Just to review…
Materials and wastes go through the tubes
Protein, glucose, most water, and some other materials return to the blood
Wastes and small amounts of water stay and are excreted

24. Analyzing signs of disease…
Doctors will dip a strip of paper into urine to test for the presence of glucose and protein.
The presence of Glucose = diabetes
The presence of Protein = kidneys not functioning correctly

25. Homeostasis with Excretion
Check in the book on page 428 first!
Excretion maintains homeostasis by keeping the body’s internal environment stable and free of harmful levels of chemicals.
Kidneys
Lungs and Skin
Liver

26. Homeostasis Kidneys Regulate amount of water in your body
Hot day – you will sweat a lot, but you don’t drink a lot so you excrete small amounts of urine

27. Homeostasis Lungs and Skin Exhale carbon dioxide and water vapor
Sweat water and urea
Liver
Breaks down wastes before excreting them

28. Excretory system Kidneys Ureters Bladder Urethra
Blood vessels (in and out)
Kidneys = bean shaped, made of millions of nephrons to filter, take trash and a little water, good stuff is kept
Kidneys
Ureters = two tubes…one from each kidney to the bladder
Ureters
Bladder = holding pouch for urine (waste products and water)
Bladder
Urethra
Urethra = tube from bladder to the outside of the body.

29. Homework Review your excretory notes.
Add a little color to the picture of the organs.
Write your name on the back of the 6 rectangles that list the steps or process.
Write the number on the front – showing which step you think it is (1 = first)
Cut out the rectangles, but do NOT glue!

30. Demo LISTEN North-west pours South-west cleans
All write out three sentence summary

31. Excretory PROCESS

32. Excretory PROCESS
Now GLUE!

33. Schoolhouse Rock
Digestion
Circulatory

34. Circulation Notice the “right” and “left”
Notice the colors – and WHEN they show each.
Does the circulatory always stay in the heart?

35. Are there any questions?