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Transcript
The Cardiovascular
System
Cardiovascular System
Function: transportation
 Blood in the transport vehicle
 Carries oxygen, nutrients, cell wastes,
hormones and other substances

Anatomy of the Heart
Size of your fist
 Weigh about a pound
 Pointed bottom in the apex
 Flatter top is the base

es
25%
W
as
t
n
ar
bo
C
nt
s
ut
rie
N
O
xy
ge
n
These are all transported by the
circulatory system except…
1. Oxygen
25% 25% 25%
2. Nutrients
3. Carbon
4. Wastes
Coverings

Pericardium- serous membrane
– Visceral pericardium- part of heart wall,
tight
– Parietal pericardium, loose anchors heart

Myocardium– thick muscles actually contracts

Endocardium
– Thin, lines the chambers of the heart
Chambers

Atria
– Receiving chambers
– Fill with blood from veins
– Send blood to ventricles
ar
y
25%
la
r
um
en
t
us
cu
te
g
cr
et
or
y
Ex
M
In
R
es
pi
ra
to
ry
Myocardium could be
considered to be part of which
other system?
1. Respiratory
25% 25% 25%
2. Excretory
3. Muscular
4. Integumentary
Chambers continued

Ventricles
– Pumping chambers
– Thick walls
– Contract to push blood through arteries
Pulmonary Circuit
Pump
Right atria and ventricle of the heart
 Superior and inferior venae cavae
bring back oxygen poor blood
 Right ventricle sends oxygen poor
blood to the lungs through pulmonary
arteries

Ventricles push blood
into…
ra
in
e
s
B
e
e
na
Ve
Th
C
av
a
rt
er
ie
4.
A
3.
25% 25% 25% 25%
in
s
2.
Veins
Arteries
Venae Cavae
The Brain
Ve
1.
Whole Body Circuit
Pump
Left side atria and ventricle
 Oxygen rich blood from lungs comes
into LA and is moved to the LV
 The LV then pumps the blood out the
aorta to the rest of the body

Valves

Atrioventricular (AV) valves- prevents
blood from back flowing into atriums
– Bicuspid-left AV
– Tricuspid- right AV

Relaxed when filling closed during
contraction
rp
le
25%
Pu
k
la
c
B
ul
lr
ed
D
Sc
ar
le
tt
What color would the blood be
in the Left Atria?
1. Scarlett
25% 25% 25%
2. Dull red
3. Black
4. Purple
Valves cont

Semilunar valves prevent backflow into
ventricles
– Pulmonary- right side
– Aortic – left side
Cardiac Circulation

Coronary arteries
– Provide oxygen and blood to the
myocardium

Coronary veins
– Bring back oxygen poor blood to the right
atrium
On the the way out…
Pulmonary Artery- out of right ventricle
 Aorta- out of left ventricle
 Arteries- blood leaving the heart
 Arterioles- small vessels carry blood
away from the heart

At the tissue…

Capillaries
– Network of tiny vessels in the tissue
– Drop off oxygen and nutrients
– Pick up waste products
On the way back…
Pulmonary vein- brings back blood
from the lungs to the left atrium
 Vena Cavae- brings back blood to right
atrium from body
 Veins- large vessels bringing blood
back
 Venule- small vessels ringing back
blood

All blood returns to the
heart through…
...
te
xt
er
4.
an
sw
3.
100%
te
r
2.
Arteries
Veins
Aortas
Capillaries
En
1.