Download Apex

Pathway of Blood Through Heart
Supplies:
 White paper
 Pencil or pencil
 3 markers (blue, red, green)
The heart is a double pump.
Right
Heart
Pump
Left
Heart
Pump
The heart is a double pump.
 Size of a closed fist and is located in the
mediastinal cavity, between the lungs,
behind the sternum, & above the
diaphragm.
 The transportation system of the body is
made up of the heart, blood vessels, &
blood.
 The heart transports oxygen to the
body, & carbon dioxide away from the
body.
The right heart pumps
(deoxygenated) blood.
Right
Heart
Pump
Deoxygenated blood is darker red (NOT BLUE)
Question
 Let's take a moment to think about this
and then we will discuss with our table
partners.
 Why do you think blood is dark red
as it circulates through the body?
Answer:
The oxygen in the blood is replaced
with carbon dioxide.
The left heart pumps
(oxygenated) blood.
Left
Heart
Pump
– Oxygenated blood is bright red
– The blood travels towards the heart from
the lungs.
 Why is blood that flows from the lungs
to the heart bright red rather than dark
red?
 Oxygen makes it red.
Drawing the right heart.
Step 1: Draw outline of heart.
Rt. side
Lf. side
apex
Write in your notes
Apex is the lowest superficial part of
the heart.
(Superficial: existing at the outermost layer)
Step 2: Draw myocardium &
septum. Identify chambers.
Rt. side
Lf. side
LA
RA
RV
myocardium
LV
septum
apex
Write in your notes
 Myocardium: the thickest muscular layer.
 Septum: a wall that prevents blood from
moving between the right side & left side
of the heart.
write in your notes
 The heart has a four part chamber:
 RA: (Right Atrium) receives
deoxygenated blood returning from the
body.
 LA: (Left Atrium) receives oxygenated
blood from the lungs.
 RV: (Right Ventricle) receives blood from the
Right Atrium & pumps the blood into the
pulmonary artery, which carries the blood to
the lungs for oxygen.
 LV: (Left Ventricle) receives blood from the
Left Atrium & pumps the blood into the aorta
for transport back into the body.
Step 3: Draw both superior &
inferior vena cavae
Rt. side
superior
vena cava
inferior
vena cava
Lf. side
LA
RA
RV
LV
septum
apex
write in your notes
 Superior Vena Cava: Vein that carries
deoxygenated blood from the upper half
of the body to the heart’s Right Atrium.
 Inferior Vena Cava: Vein that carries
deoxygenated blood from the lower half
of the body to the heart's Right Atrium.
Step 4: Draw tricuspid valve.
Rt. side
superior
vena cava
Lf. side
LA
RA
tricuspid
valve
inferior
vena cava
RV
LV
septum
apex
write in your notes
What do valves do?
valves keep the blood from flowing backwards
Tricuspid valve is located between the
Right Atrium & Right Ventricle.
Step 5: Draw pulmonary
artery.
Rt. side
Lf. side
pulmonary
artery
superior
vena cava
LA
tricuspid
valve
inferior
vena cava
RA
RV
LV
septum
apex
write in your notes
 The pulmonary artery carries blood from
the heart to the lungs, to drop off carbon
dioxide & pick up oxygen.
 There are two Pulmonary Arteries: Right & Left
 The Left pulmonary artery goes to the
Left lung & the Right Pulmonary artery
goes to the Right lung.
Question
 Which type of blood vessels carry blood
away from the heart?
 arteries
Step 6: Draw pulmonary
valve.
Lf. side
Rt. side
pulmonary
artery
superior
vena cava
tricuspid
valve
inferior
vena cava
LA
RA
pulmonary
valve
RV
LV
septum
apex
Write in your notes
 Pulmonary valve is between the Right
Ventricle & the pulmonary artery.
 It is a blood vessel that carries blood to
the lungs.
 Closes when the Right Ventricle has
finished contracting to prevent blood from
flowing back into it.
Step 7: Outline great vessels
& chambers with blue marker.
Rt. side
Lf. side
pulmonary
artery
superior
vena cava
tricuspid
valve
inferior
vena cava
LA
RA
pulmonary
valve
RV
septum
LV
apex
Step 8: Outline valves in green.
Color septum & myocardium in pink.
Rt. side
Lf. side
superior
vena cava
tricuspid
valve
inferior
vena cava
pulmonary
artery
LA
RA
pulmonary
valve
RV
septum
LV
apex
Step 9: Indicate pathway of blood
through right heart with arrows.
Rt. side
Lf. side
superior
vena cava
tricuspid
valve
inferior
vena cava
pulmonary
artery
LA
RA
pulmonary
valve
RV
septum
LV
apex
Drawing the left heart.
Questions
 Think about this question for a moment
then we will discuss with our table
partner:
 How many gallons does your heart
pump in one minute?
 Answer:
your heart will pump one to seven
gallons a minute
Step 1: Draw outline of heart.
Rt. side
Lf. side
apex
Step 2: Draw the
myocardium and septum
Rt. side
Lf. side
LA
RA
RV
myocardium
LV
septum
apex
Step 3: Draw mitral valve.
Rt. side
Lf. side
LA
RA
myocardium
mitral
valve
RV
septum
LV
apex
Write in your notes
 Mitral valve: located between the Left
Atrium & Left Ventricle.
 When the Left Ventricle is contracting,
the mitral valve closes which allows the
blood in the Left Atrium to flow into the
aorta & back into the body.
Step 4: Draw aorta.
Rt. side
Lf. side
aorta
LA
RA
myocardium
septum
mitral
valve
RV
LV
apex
write in your notes
 Aorta: the main & largest artery of the
circulatory system. Carries the blood out
of the heart from the Left Ventricle.
Step 5: Draw aortic valve.
Rt. side
aortic
valve
Lf. side
aorta
LA
RA
myocardium
septum
mitral
valve
RV
LV
apex
Write in your notes
 Aortic valve is located between the Left
Ventricle & aorta.
 Closes when the Left Ventricle is
finished contracting, allowing blood to
flow into the aorta & preventing blood
from flowing back into the Left Ventricle.
 Think about this for a moment and then
we will discuss with our table partners:
Why must the heart contract very
strongly to pump blood from the
left ventricle into the aorta?
 Answer:
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.
Step 6: Draw pulmonary
veins.
Rt. side
pulmonary
veins
aorta
Lf. side
pulmonary
veins
LA
RA
aortic
valve
myocardium
septum
mitral
valve
RV
LV
apex
Write in your notes
 Pulmonary veins carry oxygenated
blood from the lungs to the Left atrium
of the heart.
Step 7: Outline great vessels
& chambers with red marker.
Rt. side
Lf. side
pulmonary
veins
aorta
pulmonary
veins
LA
aortic
valve
RA
myocardium
RV
septum
mitral
valve
LV
apex
Step 7: Outline valves in green.
Color septum & myocardium in pink.
Lf. side
Rt. side
pulmonary
veins
aorta
pulmonary
veins
LA
aortic
valve
RA
myocardium
RV
septum
mitral
valve
LV
apex
Step 7: Indicate pathway of blood
through left heart with arrows.
Lf. side
Rt. side
pulmonary
veins
aorta
pulmonary
veins
LA
aortic
valve
RA
myocardium
RV
septum
mitral
valve
LV
apex
Final Step: Draw entire heart.
 How much does the heart weigh?
 On average a man's heart weighs 10
ounces & a woman's heart weighs 8
ounces