Download CIRCULATION AND BLOOD

3 main Functions of Circulatory
System
1. Transportation of:
a) O2 and CO2 by blood cells
b) Nutrients
c) excretory wastes filtered from kidney’s
2. Regulation – carries hormones and other
regulatory molecules
3. Protection
a) Clotting mechanism
b) Leukocytes provide immunity
Body
Tissue
Superior and
inferior vena
cava
Right
atrium
Right
Ventricle
Aorta
Left
ventricle
Pathway
Lungs
Left
atrium
The Circulatory System is organized into two parts:
Systemic Circulation: system of blood vessels that
delivers oxygenated blood to body systems.
Pulmonary Circulation: system of blood vessels that
delivers deoxygenated blood to the lungs to be replenished
with oxygen
What is the big deal?
The systemic arteries carry oxygenated blood.
The pulmonary arteries carry deoxygenated blood.
PULMONARY
ARTERY
VENA
CAVA
PULMONARY
VEIN
AORTA
1. Pulmonary Circuit
circulates blood through lungs to heart
Aorta
Body
Tissues
1.Right
Pulmonary Circuit
Atrium
Left
ventricle
Right
Ventricle
Left
atrium
Pulmonary
trunk
pulmonary
arteries
(deO2)
Pulmonary
veins (O2)
Pulmonary
venules
Pulmonary
capillaries
(exchange)
Pulmonary
arterioles
2. Systemic Circuit
• Heart to the body tissues
EXAMPLE: THE BLOOD PATH
TO THE KIDNEY...
Renal
vein
Superior
and inferior
vena cava
Renal
venules
2. Systemic Circuit
Right
atrium
Right
Ventricle
Renal
capillaries
Lungs
Left
atrium
Renal
arterioles
Renal
artery
Aorta
Left
ventricle
• a blood cell will go through at least 2
capillary beds in the circulatory system:
1. the lung capillary bed for gas exchange
2. An organ capillary bed in the body
As part of the Systemic
Circuit:
• The heart is supplied with its own coronary
blood vessels to feed the heart tissue
(myocardium)
– the heart does not use the blood in its inner
chambers
Problems with Coronary Circuit
if a coronary artery becomes plugged (e.g. with
cholesterol), and blood is not supplied to part of the
heart, a heart attack occurs.
Coronary Bypass
You need to be able to describe the flow of blood
around the body through any major organ
(e.g. Iliac, jugular/carotid, subclavian,
coronary, renal, hepatic). For example:
• e.g. path of blood to kidneys: Left ventricle
→aorta → renal artery → renal arterioles
→ capillaries → venules → renal vein →
venae cava → right atrium
Complete WS “Function of Major Blood Vessels of
the Circulatory System” including the diagram on
the reverse side
use p. 246-247, if needed