Transcript Circulatory System

Classroom Rules
2. Write Down Vocabulary:
 Atrium: Upper chamber of the heart that receives
blood from the rest of the body
 Ventricle: Lower chamber of the heart that pumps
blood out of the heart to the rest of the body
 Pulmonary: Refers to the lungs
 Systemic: Spread throughout the entire body
 Viscosity: Refers to how fluid a liquid is
 Blood with high viscosity = difficult to push through
vessels
1.
Due :
Evens: 01/06
Odds: 01/07
Answer the following questions:

Is exercise important for the heart? Why?

What is carried in the blood?

What is homeostasis?


How does the circulatory system work with other
systems to maintain homeostasis?
What are some factors that affect blood
flow?(Research, name and describe at least 3 factors)
OBJECTIVE

Identify and investigate the
general functions of the
circulatory system.

Describe the structure of the
heart and explain how it
pumps blood through the
body.
The circulatory system is divided into two
separate pathways: pulmonary circulation
and systemic circulation. How do they
work together and separately to move
blood throughout the body?

What do you think homeostasis means?
“The circulatory system maintains
homeostasis”

Homeostasis – Equilibrium

Today we will be writing down what is in
RED
1. Transports O2 (oxygen),
CO2 (carbon dioxide),
nutrients, etc. to and from
the cells of the body.
2. Helps maintain a constant
body temp. & homeostasis.
3. Carries cells that help
protect the body from
disease.

The heart is a
muscular organ that
pumps blood
throughout the body.
Blood Circulation:
 The heart functions as two
separate pumps.
 Systemic circulation:
BODY receives oxygen-rich
blood pumped by the LEFT
side of the heart
 Pulmonary circulation:
LUNGS receive oxygendepleted blood pumped by
the RIGHT side of the heart
http://www.pbslearningmedia.org/resource/tdc02.sci.life.stru.circulator/from-theheart/

Each half of the heart has an
upper chamber (atrium) and lower
chamber (ventricle).
 The right atrium receives
deoxygenated blood from the
body.
 The right ventricle pumps
blood to the lungs to pick up O2.
 The left atrium receives
oxygenated blood from the
lungs.
 The left ventricle pumps
oxygenated blood to the body.
 Arteries carry oxygenated blood
AWAY from heart.
▪ Pulmonary artery carries
deoxygenated blood to LUNGS.
 Veins bring deoxygenated blood
back to the heart.
▪ Pulmonary Vein carries
oxygenated blood from lungs to
left atrium.
 As blood flows
through the
circulatory system, it
moves through
three types of blood
vessels:
 Arteries
 Capillaries
 Veins
 Large & tough
 Thick walls that help them
withstand the powerful pressure
produced when the heart contracts.
 Carry oxygenated blood AWAY
from the heart to the tissues of
the body
 Pulmonary artery = deoxygenated
 The aorta is the first of a series of arteries that carry the
blood to the rest of the body.
 Walls are only one cell thick.
 Smallest of the blood vessels.
 Most are so narrow that blood
cells must pass
through them in
single file.
 Bring O2 & nutrients
to tissues
 Absorb CO2 & other waste from tissues
 Return deoxygenated
blood to heart.
Pulmonary vein = oxygenated
 As with arteries, the thin
walls of veins contain
connective tissue and
smooth muscle.
 Large veins contain valves
that keep blood moving
toward the heart.
Veins
Body
(Capillaries)
Arteries
Heart
When you are sitting still, your heart pumps about 5 L
of blood each time.
 When you are active, your heart pumps up to 35 L.

 Why do you think there is an increase?
1. Follow teacher directions.
2. Begin the activity in a standing position at a
station along the route taped to the floor.
3. Using the color circle representing the type of
blood for your position, walk along your route
and describe to the class what is happening at
each stop.
4. Explain what route (blood vessel) must be
followed to reach the next stop.
CO2
O2
Pulmonary
Vein
Pulmonary
Artery
RA
Vena
Cava
LA
RV LV
Aorta
WE DO:
“Go With The Flow”
Part I
“Go With The Flow”
Part 2
Instructions: Using the four basic
flowchart symbols, chart the blood’s
path through the heart and
throughout the body. Start in the
right atrium where the blood enters
the heart and end with the vena
cava veins returning blood to the
heart – one complete cardiac cycle!
Start
/End
Structure
A process
Direction
15 min
Below are the steps involved in the pumping action of the heart, but they are not in correct sequence. Put them in
order, numbering them from 1 to 9.
____ Blood will then move through the ARTERIES, then through CAPILLARIES, and then return through the VEINS.
____ The RIGHT VENTRICLE then pumps blood through the PULMONARY ARTERY into the lungs.
____ The RIGHT ATRIUM contracts and pumps the blood through the tricuspid valve and into the RIGHT VENTRICLE.
____ The left side of the heart contracts the strongest to send blood out the LEFT VENTRICLE and through the AORTA on
its way to all parts of the body.
____ Oxygenated blood then flows through the PULMONARY VEIN and into the LEFT ATRIUM.
____ Deoxygenated blood (blood without oxygen) will then return to the heart and the cycle repeats
____ In the lungs, tiny blood vessels called CAPILLARIES absorb carbon dioxide from the blood and replace it with
oxygen.
____ Oxygenated blood then pumps through the mitral valve and into the LEFT VENTRICLE.
__1_ Blood that has circulated through the body, which has lost its oxygen and collected carbon dioxide, enters through
the VENA CAVA into the RIGHT ATRIUM of the heart.
Answer the following questions in complete sentences.
1. What are the four main parts of the circulatory system?
2. Compare and contrast the three types of blood vessels.
Finish before the bell rings!