cardiovascular system made of your heart, blood & blood vessels
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Cardiovascular SystemCardiovascular System
Made of your heart, blood & blood Made of your heart, blood & blood vesselsvessels
Functions of Functions of Cardiovascular SystemCardiovascular System
Delivery systemDelivery systemBlood from heard delivers oxygen & Blood from heard delivers oxygen &
nutrients to every part of bodynutrients to every part of bodyBlood picks up waste products on Blood picks up waste products on
the return tripthe return trip
Structure of the HeartStructure of the Heart
SizeSize – slightly larger than your fist – slightly larger than your fistLocationLocation – left center of your – left center of your
chestchest4 Chambers4 Chambers::
2 Atrium – upper chambers2 Atrium – upper chambers2 Ventricles – lower chambers2 Ventricles – lower chambers
Structure of the HeartStructure of the Heart
2 Sides 2 Sides – separated by the – separated by the SeptumSeptumLeft sideLeft side – gets blood from lungs – gets blood from lungs
(high in O2)(high in O2)Right sideRight side – gets blood from body – gets blood from body
(low in O2)(low in O2)
Basic Structure of Cardio SystemBasic Structure of Cardio System
Basic StructureBasic Structure
Structure of the HeartRight Atrium – biggest atriumRight Atrium – biggest atrium
2 Major Veins - called Great Veins2 Major Veins - called Great Veins Superior Vena CavaSuperior Vena Cava - Returns - Returns
deoxygenated blood from upper bodydeoxygenated blood from upper body Inferior Vena CavaInferior Vena Cava – Returns – Returns
deoxygenated blood from lower bodydeoxygenated blood from lower bodyPumps blood to Right Ventricle Pumps blood to Right Ventricle
through through Tricuspid ValveTricuspid Valve
Structure of the Heart
Right VentricleRight Ventricle – gets blood from – gets blood from Right Atrium and pumps blood to Right Atrium and pumps blood to lungslungs
Left AtriumLeft Atrium – Receives blood from – Receives blood from lungs (Pulmonary Veins)lungs (Pulmonary Veins)Pumps blood to Left Ventricle through Pumps blood to Left Ventricle through
Bicuspid ValveBicuspid Valve
Structure of the HeartLeft VentricleLeft Ventricle – gets blood from Left – gets blood from Left
AtriumAtriumVery thick walls – pumps blood Very thick walls – pumps blood
throughout bodythroughout bodyPumps blood through the AortaPumps blood through the Aorta
AortaAorta – Largest blood vessel in body – Largest blood vessel in body (interior(interior diameter of about 1 inch)diameter of about 1 inch)Pumps blood to every part of bodyPumps blood to every part of body
Structure of the Heart
Animated HeartAnimated Heart
Heart BeatHeart Beat
See also Coronary Bypass, Pacemaker, etcSee also Coronary Bypass, Pacemaker, etc
Blood StructureBlood Structure7% of a person’s body weight7% of a person’s body weight90% water & 10% dissolved 90% water & 10% dissolved
substance substance Made up of:Made up of:
PlasmaPlasmaWhite Blood CellsWhite Blood CellsRed Blood CellsRed Blood CellsPlateletsPlatelets
Blood StructureBlood StructurePlasmaPlasma – makes up about 50 % – makes up about 50 %
of blood volumeof blood volumeKeeps blood flowingKeeps blood flowingColor of strawColor of strawContains substances such as Contains substances such as
proteins, salts, glucose, vitamins, proteins, salts, glucose, vitamins, hormones & antibodieshormones & antibodies
Blood StructureBlood StructureWhite Blood CellsWhite Blood Cells – leukocytes – leukocytes
Many varieties defend body against Many varieties defend body against bacteria & other enemiesbacteria & other enemies
ColorlessColorlessFormed in red bone marrow, Formed in red bone marrow,
lymphatic tissue, spleen, lymph lymphatic tissue, spleen, lymph nodes, & thymusnodes, & thymus
Fewer in number than RBC (1 to 700)Fewer in number than RBC (1 to 700)
Blood StructureBlood StructureRed Blood CellsRed Blood Cells – erythrocytes – erythrocytes
Look like donut, very flexibleLook like donut, very flexibleCarry O2 to all tissues from lungsCarry O2 to all tissues from lungsCarry CO2 from tissues to lungsCarry CO2 from tissues to lungsHemoglobinHemoglobin – bright red when combined – bright red when combined
with O2with O2RBC’s live approximately 120 daysRBC’s live approximately 120 days
Blood StructureBlood StructurePlateletsPlatelets – thrombocytes – thrombocytes
Small fragments that clump together Small fragments that clump together and stick to blood vessels to plug up and stick to blood vessels to plug up leaksleaks
Lifespan of 5 to 9 daysLifespan of 5 to 9 daysFormed in bone marrowFormed in bone marrowLook like oval plates (thus the name)Look like oval plates (thus the name)
Blood StructureBlood Structure
Blood VesselsBlood Vessels
Blood VesselsBlood Vessels – hollow tubes – hollow tubes100,000 long100,000 longExpand and contractExpand and contract
Blood Vessels - ArteriesBlood Vessels - Arteries
ArteriesArteries – carry blood from away – carry blood from away from heartfrom heartWalls are thicker than other vessels Walls are thicker than other vessels
(higher pressure)(higher pressure)AneurysmAneurysm – abnormal expansion of – abnormal expansion of
the artery due to a weaknessthe artery due to a weaknessArteriosclerosisArteriosclerosis – hardening of the – hardening of the
arteriesarteries
Arteries - AneurysmArteries - Aneurysm
Aneurysm: Aneurysm: 1 saccular aneurysm, 1 saccular aneurysm,
2 right pulmonary 2 right pulmonary artery, artery,
3 arch of the aorta, 3 arch of the aorta, 4 left pulmonary 4 left pulmonary
artery, artery, 5 pulmonary trunk 5 pulmonary trunk
Arteries - ArteriosclerosisArteries - Arteriosclerosis
Blood Vessels - VeinsBlood Vessels - VeinsVeinsVeins – carry blood from – carry blood from
body to heartbody to heartGet bigger as they get closer to Get bigger as they get closer to
heartheartContain valves that allow blood to Contain valves that allow blood to
flow only one wayflow only one wayVaricose VeinsVaricose Veins – valves in legs – valves in legs
breakdown and allow the blood to breakdown and allow the blood to flow backwardsflow backwards
Veins – Varicose VeinsVeins – Varicose Veins
Veins – Varicose VeinsVeins – Varicose Veins
Blood Vessels - CapillariesBlood Vessels - Capillaries
CapillariesCapillaries – smallest – smallest working unit in the bloodworking unit in the bloodConnect arterioles to venulesConnect arterioles to venules1 cell thick1 cell thickExchange nutrients, O2, and Exchange nutrients, O2, and
CO2CO2
CapillariesCapillaries
CapillariesCapillaries
THE ENDTHE END