Title: EXPLORING THE CIRCULATORY SYSTEM
1EXPLORING THE CIRCULATORY SYSTEM
2What is the circulatory system?
3The circulatory system is a complex system in the
body.
- Pulmonary System
- Coronary System
- Systemic System
4The circulatory system consists of the heart and
blood vessels.
5One of the major functions of the circulatory
system is transportation.
Hey, I am supposed to be fighting an infection
here! Send some white blood cells right away!
6The circulatory system transports many items by
blood and blood vessels.
CautionOxygen Transport
7One of the major functions of the circulatory
system is to
- Transport oxygen to cells in the body.
-
- To transport waste products such as carbon
dioxide out of the cells in the body.
8Many substances in the body are transported by
the circulatory system.
Oxygen enters the cell by the blood vessels.
Carbon dioxide leaves the cell and
is transported away by the blood vessels.
9The heart is a major organ of the circulatory
system.
- What is the history of the heart?
- Check out the structure of the heart.
- Find out about blood.
10The heart is about the size of your hand when you
make a fist.
- It is a strong muscular organ.
- The muscle that makes up your heart is called
cardiac muscle.
Approximate size of the human heart.
11The heart acts as a pump for the circulatory
system.
12Did you know you have electricity in your heart?
13The electrical system in your heart stimulates
your heart to beat.
14The force of the hearts pumping action keeps the
blood circulating throughout the body.
15The heart has its own blood supply.
The coronary arteries provide a blood supply to
the heart.
16There are different parts of the heart.
- View the heart and its anatomical parts.
- http//www.gen.umn.edu/faculty_staff/jensen/1135/w
ebanatomy/wa_cvs/wa_heart_internal1.html - Trace the flow of blood through the heart.
17Another part of the circulatory system is the
blood vessels.
18The blood vessels act to carry the blood
throughout the body.
19Major blood vessels in the circulatory system are
the
- Arteries
- Veins
- Capillaries
20Arteries are blood vessels that carry blood from
the heart to the rest of the body.
The blood contained in arteries is rich in
oxygen.
21Arteries transport oxygen rich blood to the cells
of the body.
- Remember, transportation of oxygen to the cells
is one of the vital functions of the circulatory
system.
CautionOxygen Transport
22Small arteries that branch off from a major
artery are called arterioles.
Arterioles also carry oxygen rich blood and are
connected to the capillaries.
23ARTERIES
ARTERIOLES
CAPILLARIES
24Capillaries are blood vessels that allow
the exchange of oxygen and carbon dioxide to
occur.
25Capillary vessels allow contact of blood with
body cells.
26- The capillaries have a thin wall.
- This thin wall allows substances to pass into and
out of the capillary. - The capillary wall allows the oxygen and
nutrients to pass from the capillary to the body
cells. - A reverse process also occurs.
- Carbon dioxide and other waste products exit the
capillary and are carried away by the venous
system.
27Capillaries connect arteries to veins in the
circulatory system.
We are all connected.
28 Blood Vessel Connections
Artery
Blood from heart (Oxygenated)
Arteriole
Capillary
Veinule
(Unoxygenated) Blood returning to heart
Vein
29Veins are blood vessels that carry unoxygenated
blood in the body.
NO OXYGEN
30Small blood vessels branch off of veins and are
called venules.
31Venules are connected to the capillaries.
Venules
Veins
Blood travels back to the heart
32 Blood Vessel Connections
Artery
Blood from heart (Oxygenated)
Arteriole
Capillary
Veinule
(Unoxygenated) Blood returning to heart
Vein
33Review the major points
- The circulatory system is complex.
- Its major function is transportation.
- The heart is the main organ of the circulatory
system. - The heart beat is stimulated by an electrical
charge. - The pumping action of the heart directs blood
flow throughout the body. - There are 3 types of blood vessels.
- One of the major functions of the blood vessels
is to carry oxygen to the cells and remove carbon
dioxide.
34Now its time for you to answer some questions!