Transcript Cardiovascular System

Cardiovascular System
Made of your heart, blood & blood
vessels
Functions of
Cardiovascular System
 Delivery
 Blood
system
from heard delivers oxygen &
nutrients to every part of body
 Blood picks up waste products on
the return trip
Structure of the Heart
– slightly larger than your fist
 Location – left center of your
chest
 4 Chambers:
 Size
– upper chambers
 2 Ventricles – lower chambers
 2 Atrium
Structure of the Heart
Sides – separated by the
Septum
2
side – gets blood from lungs
(high in O2)
Right side – gets blood from body
(low in O2)
Left
Basic Structure of Cardio System
Basic
Structure
Structure of the Heart
 Right
2
Atrium – biggest atrium
Major Veins - called Great Veins
Superior Vena Cava - Returns
deoxygenated blood from upper body
 Inferior Vena Cava – Returns
deoxygenated blood from lower body

 Pumps
blood to Right Ventricle
through Tricuspid Valve
Structure of the Heart
Ventricle – gets blood from
Right Atrium and pumps blood to
lungs
 Right
– Receives blood from
lungs (Pulmonary Veins)
 Left Atrium
 Pumps
blood to Left Ventricle through
Bicuspid Valve
Structure of the Heart
Ventricle – gets blood from Left
Atrium
 Left
thick walls – pumps blood
throughout body
 Pumps blood through the Aorta
 Very

Aorta – Largest blood vessel in body
(interior diameter of about 1 inch)
 Pumps blood to every part of body
Structure of the Heart
Animated Heart


Heart Beat
See also Coronary Bypass, Pacemaker, etc
Blood Structure
 7%
of a person’s body weight
 90% water & 10% dissolved
substance
 Made up of:
 Plasma
 White
Blood Cells
 Red Blood Cells
 Platelets
Blood Structure
– makes up about 50 %
of blood volume
 Plasma
 Keeps
blood flowing
 Color of straw
 Contains substances such as
proteins, salts, glucose, vitamins,
hormones & antibodies
Blood Structure
 White
Blood Cells – leukocytes
 Many
varieties defend body against
bacteria & other enemies
 Colorless
 Formed in red bone marrow,
lymphatic tissue, spleen, lymph
nodes, & thymus
 Fewer in number than RBC (1 to 700)
Blood Structure
 Red
Blood Cells – erythrocytes
 Look
like donut, very flexible
 Carry O2 to all tissues from lungs
 Carry CO2 from tissues to lungs
 Hemoglobin – bright red when combined
with O2
 RBC’s live approximately 120 days
Blood Structure
 Platelets
 Small
– thrombocytes
fragments that clump together
and stick to blood vessels to plug up
leaks
 Lifespan of 5 to 9 days
 Formed in bone marrow
 Look like oval plates (thus the name)
Blood Structure
Blood Vessels

Blood Vessels – hollow tubes
100,000 long
 Expand and contract

Blood Vessels - Arteries
– carry blood from away
from heart
 Arteries
 Walls
are thicker than other vessels
(higher pressure)
 Aneurysm – abnormal expansion of
the artery due to a weakness
 Arteriosclerosis – hardening of the
arteries
Arteries - Aneurysm





Aneurysm:
1 saccular aneurysm,
2 right pulmonary
artery,
3 arch of the aorta,
4 left pulmonary
artery,
5 pulmonary trunk
Arteries - Arteriosclerosis
Blood Vessels - Veins
 Veins – carry blood from body
to heart
 Get
bigger as they get closer to
heart
 Contain valves that allow blood to
flow only one way
 Varicose Veins – valves in legs
breakdown and allow the blood to
flow backwards
Veins – Varicose Veins
Veins – Varicose Veins
Blood Vessels - Capillaries
– smallest
working unit in the blood
 Capillaries
Connect
arterioles to venules
1 cell thick
Exchange nutrients, O2, and
CO2
Capillaries
Capillaries
THE END