VEINS
ARTERIES
HEART
BLOOD
LUNGS
ATRIUM
AORTA
VENTRICLE
CELLS
OXYGEN
NUTRIENTS
CARBONDIOXIDE
CAPILLARIES
ALVEOLI
C
T
C
A
P
I
L
L
A
R
I
E
S
O
A
Y
A
L
V
E
O
L
I
N
H
J
O
R
R
I
A
D
E
U
U
E
U
E
Q
K
X
M
B
O
R
A
O
L
A
T
A
I
A
C
Y
O
O
E
U
C
F
T
R
R
O
G
R
L
G
D
N
I
A
U
R
I
T
N
S
B
T
I
E
R
D
L
Z
I
E
C
B
G
D
V
E
T
N
U
I
D
U
N
E
A
M
U
N
N
R
L
L
M
O
M
T
L
L
I
B
E
U
I
I
U
A
I
X
S
L
T
E
V
U
S
Z
I
E
N
W
L
I
S
H
V
E
I
N
S
Y
H
S
G
O
C
D
G
A
O
R
T
A
O
H
N
W
S
J
K
E
