Transcript 1. The Circulatory System

The Pathway of Blood
1 of 36
© Boardworks Ltd 2006
Overview
2 of 36
© Boardworks Ltd 2006
Circulation
Deoxygenated blood returns to the
right side of the heart through the
superior vena cava (upper body)
and inferior vena cava (lower body)
Deoxygenated blood is pumped
from the heart to the lungs through
the pulmonary arteries.
Oxygenated blood returns to the left
side of the heart through the
pulmonary veins.
Septu
m
3 of 36
Oxygenated blood is pumped at high
pressure from the heart to the body
through the aorta.
© Boardworks Ltd 2006
Pulmonary vs. Systemic Circulation
Pulmonary Circulation
Deoxygenated blood to
lungs and back to heart
RED GOLD
Systemic Circulation
Oxygenated blood to
body and back to heart
4 of 36
© Boardworks Ltd 2006
Coronary Circulation
The heart is so thick that it requires
coronary arteries to deliver blood deep
into the myocardium or heart muscle.
5 of 36
© Boardworks Ltd 2006
Pathway
6 of 36
t a k es
d
o
t
o
h
l
he r
t
b y
o
a
a
p
h
u
w
e
t
g
e
h h
a
h
r
t
t
© Boardworks Ltd 2006
Pathway of Circulation
LUNGS
BODY
VENA CAVA
7 of 36
© Boardworks Ltd 2006
Pathway of Circulation
6
Superior
Superior
Vena Cava
Vena Cava
13
12
14
8
5
Pulmonary
Artery
Pulmonary
Vein
7
9
It takes about 1 min.
for blood to make 1
complete cycle
1
2
11
And so on…
Inferior Vena Cava
14
10
3
Inferior Vena Cava
4
8 of 36
© Boardworks Ltd 2006
Anatomy of Heart - Review
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
M.
N.
O.
P.
Q.
R.
S.
T.
U.
9 of 36
brachiocephalic artery
A
right pulmonary artery
B
right pulmonary veins
superior vena cava C
aortic valve
right atrium
tricuspid valve
D
right ventricle
inferior vena cava
E
left common carotid artery
left subclavian artery
F
aorta
left pulmonary artery
G
pulmonary trunk
left pulmonary veins
H
left atrium (auricle)
mitral valve
I
pulmonary valve
Papillary muscle
left ventricle
Septum
J
K
L
M
N
O
P
Q
R
S
T
U
© Boardworks Ltd 2006