The circulatory system functions to transport oxygen, nutrients, wastes and more throughout the body. It is composed of the heart, blood and blood vessels. The heart pumps blood through three main circuits - pulmonary, coronary and systemic. Blood carries oxygen, nutrients and waste via arteries, veins and capillaries. Conditions like high blood pressure can be dangerous if not managed.

1. The Human Circulatory
System

2. • E2.2 perform a laboratory or computer-
simulated dissection of a representative
animal, or use a mounted anatomical model, to
• E3.3 explain the anatomy of the circulatory
analyse the relationships between the
system e.g., blood components, blood
respiratory, circulatory, and digestive
vessels, the heart) and its function in
systems [PR, AI]
transporting substances that are vital to
health
• E2.3 use medical equipment (e.g., a
stethoscope, a sphygmomanometer) to • E3.4 describe some disorders related to the
monitor the functional responses of the respiratory, digestive, and circulatory
respiratory and circulatory systems to systems (e.g., asthma, emphysema,ulcers,
external stimuli (e.g.,measure the change in colitis, cardiac arrest, arteriosclerosis)
breathing rate and heart rate after exercise)
[PR, AI]
SBI 3U

3. • Functions
• Circuits
• Components
Heart, Blood, Veins and Arteries, Capillaries
• Cardiac Cycle
• Heart Beats
• Blood Pressure
For Consideration

4. Closed System
• blood never leaves the
network of blood
vessels
• O2, CO2, and
nutrients are diffused
from blood into
tissues
Human Circulatory System

5. • Transport of oxygen and carbon dioxide
• Distribution of nutrients and transport of wastes
• Maintenance of body temperature
• Circulation of hormones
• Protection against blood loss from injury
Functions

6. The Human Heart

7. • Has 4 chambers where blood fills
• Top chambers are called atria
• Bottom chambers are called ventricles
• Atria and ventricles are separated from each other via a
septum (thick muscular wall)
• Valves in the heart prevent blood from flowing the wrong
way
• Pumps blood through the body via a network of veins and
arteries
The Human Heart

8. • Pulmonary Circulation
• Coronary Circulation
• Systemic Circulation
3 Main Circuits

9. • Oxygen rich blood is pumped within the heart muscle
Coronary Circulation

10. • Oxygen poor blood is pumped into the lungs
• Oxygen rich blood is carried back to the heart
Pulmonary Circulation

11. • Oxygen rich blood is carried to body tissues
• Oxygen poor blood is carried back to the heart
Systemic Circulation

12. Pulmonary and Systemic
Systems

13. Pulmonary and Systemic
Systems

14. Blood Flow Activity

15. • Made up of 4 Components
1. Plasma
2. White Blood Cells
3. Platelets
4. Red Blood Cells
Blood

16. • Deliver oxygen to the body tissues received from lungs and remove
carbon dioxide from the bodies tissues
• Red only because they contain a protein chemical called hemoglobin
which is bright red in color
• Hemoglobin contains the element Iron, making it an excellent vehicle
for transporting oxygen and carbon dioxide
• The average life cycle of a red blood cell is 120 days
Red Blood Cells

17. • Also called Leukocytes
• Protect the body from disease
• Will produce antibodies in the body to fight off germs and
infection
White Blood Cells

18. • Platelets are irregularly-shaped, colorless bodies that are
present in blood. Their sticky surface lets them, along
with other substances, form clots to stop bleeding.
• The mineral calcium, vitamin K, and a protein called
fibrinogen help the platelets form a clot.
Platelets

19. • Liquid component of blood which is 90% water
• contains blood proteins, glucose, vitamins, minerals, dis-
solved gases, and waste products of cell metabolism.
• Proteins help maintain body homeostasis
Plasma

20. • one epithelial cell thick
• exchange of oxygen and carbon dioxide takes place
through the thin capillary wall.
• red blood cells inside the capillary release their oxygen
which passes through the wall and into the surrounding
tissue.
• tissue releases its waste products, like carbon dioxide,
which passes through the wall and into the red blood
cells.
Capillaries

21. Capillary Exchange

22. Cardiac Cycle

23. • is controlled by a nerve impulse called the Sino
atrial node (SA node).
• The SA node is also referred to as the natural
pace maker.
• . The “lub” sound is produced when the
tricuspid and mitral valves open and close.
• The “dub” sound occurs when the pulmonary
and aortic valve open and close.
Heart Beat

24. • http://chs.sd57.bc.ca/~jbleecker/science/bi12ppt/Bio12_2/
C13_Circulatory%20System_Newer/cardiac.swf
Heart Beat

25. • An electrocardiogram (ECG) is a test that
measures the electrical activity of the heart.
• A normal resting heart rate is 70 beats per
minute with a consistent and even rhythm
• As you know, your heart rate can fluctuate
throughout the day.
• Factors affecting HR can include exercise,
sleeping, emotions, drugs and.
Heart Rate

26. • A sphygmomanometer is used to measure blood
pressure. The normal average blood pressure reading is
120/80. The systolic pressure is always recorded first.
Blood Pressure

27. High blood pressure is dangerous because:
• pressure the blood places on the vessels may cause them to burst
• narrowing of the artery.
• build up of plaque on the arterial walls.
• High blood pressure can generally be reduced by making lifestyle
changes such as exercise and healthy diet
High Blood Pressure

28. Measuring BP

29. Circulatory Conditions
• Angina
• Atherosclerosis
• Arrythmias
Lymphatic System
Other Things to Consider

30. • www.innerbody.com
• www.youtube.com
• Nelson Biology 11 Text
Resources