1. Body Systems Circulatory System
7th Grade Science

2. Circulatory System Structures
Heart
Blood Vessels
Arteries
Veins
Capillaries
Blood

3. Circulatory System Function
transport materials throughout the body

4. Your Heart: The Vital Pump
At REST, the heart pumps about 5 QUARTS of blood a minute.
During EXTREME EXERTION (exercise) it can pump 40 quarts a minute.

5. Two Pathways Pulmonary Circulation Systemic Circulation
Carries blood to lungs and back to the heart
Systemic Circulation
Carries blood to body and back to the heart

6. Heart: Structure and Function
Keeps blood moving
Large organ composed of Cardiac muscle

7. Structure of Heart Four chambers Two upper (Atria) Right Atria
Left Atria
Two lower (Ventricles)
Right Ventricle
Left Ventricle

9. Bloods Path Through the Heart
Both Atria fill at same time
Rt atrium receives oxygen POOR blood from body via the vena cavas
Left atrium receives oxygen RICH blood from lungs through four pulmonary veins
After filled with blood atria contract, pushing blood into ventricle

10. Both ventricles contract
Right ventricle contracts and pushes oxygen-poor blood toward lungs,
against gravity,
through pulmonary arteries

11. Bloods Path Through the Heart (cont)
Left ventricle contracts and forces oxygen rich blood
out of heart through
aorta (largest vessel)

12. Your Blood Vessels: Pathway of Circulation
3 types of vessels
Arteries
Capillaries
Veins

13. Artery vs. Vein

14. Arteries: carries blood Away from heart
Large
Thick-walled, Muscular
Elastic
Oxygenated blood
Exception Pulmonary Artery
Carried under great pressure
Steady pulsating
Arterioles: smaller vessels, enter tissue

16. Capillaries Smallest vessel Microscopic Walls one cell thick
Nutrients and gases diffuse here

17. Capillaries of head and arms
Capillaries of abdominal organs and legs
Inferior vena cava
Pulmonary vein
Capillaries of right lung
Superior vena cava
Aorta
Pulmonary artery
Capillaries of left lung

18. The Blood Body contains 4-6 L Consists of Water Red Blood Cells Plasma
White blood cells and platelets

19. Platelets PLATELETS are for CLOTTING blood Cell fragments
Produced in bone marrow
Fibrin (sticky network of protein fibers)
Form a web trapping blood cells

20. Blood Clotting Section 37-2 Break in Capillary Wall
Blood vessels injured.
Clumping of Platelets
Platelets clump at the site and release thromboplastin. Thromboplastin converts prothrombin into thrombin..
Clot Forms
Thrombin converts fibrinogen into fibrin, which causes a clot. The clot prevents further loss of blood..

21. Blood Types Massive loss of blood requires a transfusion Four TypesAB O
Inherited from your parents

22. Blood Types

23. What happens when you mix blood types?
Plasma contains proteins that correspond to the shape of the different antigens
If you mix one type with the wrong one, you get CLUMPING
Type O is the universal donor
Type AB is the universal acceptor

24. Blood Transfusions Blood Type of Donor Blood Type of Recipient
A B AB O A B AB O
Unsuccessful transfusion
Successful transfusion

25. Getting to the Heart of the Matter

26. ENGAGE 1. Walt Disney’s 1957 “Hemo the Magnificent”
2. Play song from St. Joseph’s Aspirin Commercial (originally in Happy Days episode) at:

27. Lyrics Pump, pump, pumps your Blood.
The right atrium’s where the process begins, where the CO2 Blood enters the heart.
Through the tricuspid valve, to the right ventricle, the pulmonary artery, and lungs.
Once inside the lungs, it dumps its carbon dioxide and picks up its oxygen supply.
Then it’s back to the heart through the pulmonary vein, through the atrium and left ventricle.
Pump, pump, pumps your Blood. 

28. Circulatory System Simulation
EXPLORE
Circulatory System Simulation

29. Capillaries of head and arms
Capillaries of abdominal organs and legs
Inferior vena cava
Pulmonary vein
Capillaries of right lung
Superior vena cava
Aorta
Pulmonary artery
Capillaries of left lung

30. Circulation Coloring Activity
EXPLAIN
Circulation Coloring Activity
1. Color the path of oxygenated blood red.
2. Color the path of deoxygenated blood blue
3. Label the following structures on the above diagram:
Aorta Left Atria Right Atria Left Ventricle Right Ventricle Lungs Vena Cava Tissues of the Body Capillaries
4. Use arrows to indicate blood flow direction.

31. Circulation Relay What is Blood Made of?
ELABORATE
Circulation Relay
What is Blood Made of?

32. What is Blood Made of?
CANDY RED HOTS 44%: Red Blood Cells (RBCs) - carry oxygen and carbon dioxide around body, RBCs only live for about 3 months but are continuously produced in the bone marrow. CORN SYRUP 55%: Plasma/Water - syrupy, thick, clear, yellowish liquid that carries dissolved food and wastes in water. WHITE JELLY BEANS 1/2%: White Blood Cells (WBCs) - bigger than RBCs, oddly-shaped cells that 'eat' bits of old blood cells and attack germs. CANDY SPRINKLES 1/2%: Platelets - bits of cells and cytoplasm that help your blood clot.

33. EVALUATE
Given a drawing the student will label and describe the functions of the four major parts of the circulatory system: Heart, arteries, veins and capillaries.
After participating the circulatory relay simulation, the learner will travel the correct circulation pathway beginning at the left ventricle and ending at the left atrium.
After participating in the blood activity, the learner will list the following four components of the blood: RBC, WBC, Plasma and Platelets and describe the function of blood.