8th grade contents

1. The Circulatory System
8th grade

2. An Overview of the Circulatory
System
►Check out how the heart works on the
Web!!
►How the Heart Works

3. Where the Heart is located

4. Circulatory or Cardiovascular System
►Circulatory System – Keeps the body
working by delivering oxygen to body cells
and removing waste (Co2) from the cells.
Removing
Delivering

5. Parts of the Circulatory System
►The Heart - is divided into FOUR Chambers

6. Two types of Arteries
► Arteries start with A takes
blood away !!
► Aorta – Largest blood
vessel in the heart
► Pulmonary Artery – Carries
blood containing carbon
dioxide from your heart to
your lungs

7. Three Types of Veins
► Veins start with V
brings blood back to
me
 1. Inferior Vena Cava –
Where the blood enters the
heart from the body.
 2. Superior Vena Cava –
Where the blood enters the
heart from the body.
 3. Pulmonary Vein – Carries
blood-containing oxygen
from your lungs to your
heart.

8. The Four Valves of the Heart
► Tricuspid Valve – Lets
the blood fill in the
right atrium before it
enters the right
ventricle.
► Bicuspid Valve – Lets
the blood fill in the left
atrium before it enters
the left ventricle

9. The Four Valves of the Heart
► Right Semi lunar Valve-
Lets the right ventricle fill
before releasing the blood
into the pulmonary artery.
► Left Semi lunar Valve –
Lets the blood fill in the
left ventricle before
sending it to the aorta
► Septum – Divides the
heart in half

10. Three Kinds of Blood Vessels
►Arteries – Carries blood away from the heart
►Veins – Carries blood back to the heart
►Capillaries – Delivers low-oxygen blood to
veins (Smallest)

11. Video of the Valves of the Heart
►The Valves of the Heart

12. Parts of the Blood
► Red Blood Cells – Made in
bone marrow; carries oxygen,
food, and rids body of CO2 and
Waste
► White Blood Cells – Help fight
disease and infection by
destroying bacteria and germs
that enter the body. Made in the
lymph nodes

13. Parts of the Blood
► Platelets – Help
blood to clot, to
prevent excess
bleeding.
► Plasma – Water
portion of the blood;
55% of blood is
plasma

14. Four Types of Blood
►Type A: 42% Accepts A and O
►Type B: 10% Accepts B and O
►Type AB: 3% Accepts AB and O
►Type O: 45% Universal Donor
►RH Factor = is the + and – of the blood

15. Four Filters of the Blood
1. Liver
2. Kidneys
3. Lymph Nodes
– located in
the neck
4. Spleen –
Cemetery for
the red blood
cells

16. How Blood Moves Through the Heart

17. How Blood Moves Through the Heart

18. LABORATORY 1

19. LAB: Red blood cells –Membrane transport.
LABORATORY 2

22. CHALLENGE !
►Application Question:
Ms. Palmeri traveled to Italy this summer and
went swimming in the Mediterranean Sea.
Her skin felt very dry after a long day of
swimming. Using your knowledge of
osmosis, explain why her skin feels dry.
►Effects of Osmosis in Plant Cells
(Hypertonic-Hypotonic Solution)

23. •Food Science: Why does lettuce become limp if
you add salad dressing too soon?