1. The Circulatory System
Miss Christensen 1

2. CIRCULATORY SYSTEM???? WHAT IS THE Functions:
Facilitates ________________
Delivers ______________ to cells
Picks up cellular ______________
__________________ regulation
Delivers __________________
Booklet handout
Video handout
Graphic Organizer
Public Health Assignment 2

3. The circulatory system in humans contains 3 parts:
1) ____________ – The circulating fluid.
2) __________________ – The transporting medium.
3) __________ – The pumping station.

4. 4

5. PART ONE: THE BLOOD
The average human adult has _____ litres of blood (~8% weight).
Functions of the blood:
________________: Oxygen, carbon dioxide, wastes, nutrients, heat, hormones
________________: pH, temperature
________________: white blood cells
_____________: prevents blood loss (platelets)

6. THE BLOOD
Blood is composed of two parts: ____________ (a complex fluid); and formed __________ (erythrocytes, leucocytes and platelets). 6

7. 1) Blood Plasma _______________ thick fluid
Makes up _______ of blood volume
Consists of 91.5% ___________, 7% proteins, and 1.5% dissolved food, enzymes, vitamins, hormones, antibodies, waste products, inorganic salts and gases

8. 2) Erythrocytes __________________________ (45% of blood)
5 million per mL of blood (25 trillion in human body!!!)
Every sec you produce ~10 million new RBC’s
Formed in ________________________ (inside your bones)
Have no ______________
Life span of ______ days
About 2 million dead erythrocytes must be removed from the blood every second.
They are destroyed and filtered out by the __________ and ___________. 8

9. 2) Red Blood Cells
Red color: due to the presence of the protein ______________.

10. 2) Red Blood Cells
Concave shape gives the cell a large _______________________ through which oxygen can diffuse.
Also makes them _____________, easily squeeze through capillaries.
Blood changes colors:
Oxygenated  Deoxygenated
(__________) (____________)

11. 3) Leukocytes ________________________ (~1% of blood)
Larger cells, but less numerous than erythrocytes 5 – 10 thousand per mL
They are _____________ shaped cells that contain a _______
Cells live between 12 hours to several years
Main function is to ______________ the body from foreign material such as __________ by engulfing them (phagocytosis). 11

12. 4) Platelets
Smallest cellular components
No ___________, live 5-9 days
Produced in the _____ marrow
250, 000 platelets per mL of blood
Platelets are responsible for the initial stages of __________________________.

13. Platelets and Clot Formation
Blood must have the ability to “_______” wounds (cuts and scrapes).
There are four components involved in the clotting process:
__________________

14. Blood Clotting Platelets: Clotting Factors: Cell fragments
React to the air and become __________. Forms an initial ________.
Clotting Factors:
12 Factors needed
They are proteins that __________ the platelet plug.

15. Blood Clotting Fibrin: Other Cells:
A web-like protein _______ that strengthens the clot.
Fibrin formation = __________________
Other Cells:
White and Red blood cells get __________ and add to the structure.

17. Blood Disorders - Hemophilia
________________________ in which a specific blood clotting factor is lacking or, a ______________ that abnormally delays coagulation when bleeding occurs whether internal or external
Result: Bleeding is difficult to stop.
400,000 people are affected (mostly males).
Treatment: ____________________ can be given to people to aid clot formation.
Biggest concern with this condition?
_________________ bleeding