Circulatory SystemCirculatory System

Functions of Circulatory Functions of Circulatory SystemSystem

TransportationTransportation OxygenOxygen Nutrients Nutrients HormonesHormones AntibodiesAntibodies Carbon dioxideCarbon dioxide Waste Waste

Fluid balanceFluid balance Intracellular fluidIntracellular fluid

• Fluid in a cellFluid in a cell Extracellular fluidExtracellular fluid

• Fluid surrounding a Fluid surrounding a cellcell

Parts of the Circulatory Parts of the Circulatory SystemSystem

3 main parts3 main parts HeartHeart

• Pumps bloodPumps blood BloodBlood

• Transports nutrientsTransports nutrients VesselsVessels

• Blood travels Blood travels through through

Divisions of Circulatory Divisions of Circulatory SystemSystem

Pulmonary Pulmonary circulationcirculation Blood circulating Blood circulating

from heartfrom heart To lungsTo lungs Back to the heartBack to the heart

Divisions of Circulatory Divisions of Circulatory SystemSystem

Systemic Systemic circulationcirculation Blood circulates Blood circulates

from the heartfrom the heart To all cells and To all cells and

tissue tissue Except lungsExcept lungs

Back to the heart.Back to the heart.

HeartHeart FunctionFunction

To pump and receive To pump and receive blood.blood.• 2 pumps in one2 pumps in one

Right heart Right heart • Receives and pumps Receives and pumps

deoxygenated blooddeoxygenated blood Left heart Left heart

• Receives and pumps Receives and pumps oxygenated bloodoxygenated blood

Chambers of the HeartChambers of the Heart AtriaAtria

Upper chambersUpper chambers• R+ L atriumR+ L atrium

Receive bloodReceive blood VentricleVentricle

Lower chambersLower chambers• R + L ventricleR + L ventricle

Pumping chambersPumping chambers ValvesValves

One way ‘doors’ One way ‘doors’ between chambersbetween chambers

Blood Flow through the Blood Flow through the HeartHeart

Layers of the HeartLayers of the Heart

EndocardiumEndocardium Inside layer Inside layer

MyocardiumMyocardium Middle layerMiddle layer

• Heart wallHeart wall

EpicardiumEpicardium Outside layer of Outside layer of

heartheart• Inside layer of the Inside layer of the

pericardiumpericardium

Layers of the HeartLayers of the Heart

PericardiumPericardium

PericardiumPericardium Double walled sac Double walled sac

that surrounds the that surrounds the heartheart• Produces pericardial Produces pericardial

fluidfluid• Reduces friction Reduces friction

created w/ heart created w/ heart beatsbeats

BloodBlood FunctionFunction

To move blood cells To move blood cells throughout the body.throughout the body.

PlasmaPlasma Liquid portionLiquid portion

• 90% water90% water

CorpusclesCorpuscles Blood cellsBlood cells

• ErythrocytesErythrocytes• LeukocytesLeukocytes• Thrombocytes Thrombocytes

Corpuscles / Blood CellsCorpuscles / Blood Cells

Erythrocytes Erythrocytes RBC’s RBC’s (red blood cells)(red blood cells)

Contain hemoglobinContain hemoglobin• Carry OCarry O2 2

• Eliminate COEliminate CO22

• ‘‘transporters’ transporters’

ThrombocytesThrombocytes PlateletsPlatelets

• Clot the bloodClot the blood

LeukocytesLeukocytes WBC’s WBC’s (white blood cells)(white blood cells)

‘‘infection fighters’infection fighters’ 5 types5 types

• BasophilsBasophils• EosinophilsEosinophils• LymphocytesLymphocytes• MonocytesMonocytes• Neutrophils Neutrophils

VesselsVessels

FunctionFunction To carry blood / blood To carry blood / blood

cells to all the parts of cells to all the parts of the body.the body.

3 main types3 main types ArteriesArteries VeinsVeins CapillariesCapillaries

ArteryArtery

Largest blood Largest blood vesselvessel Carry blood Carry blood awayaway

from the heartfrom the heart Spurt if cutSpurt if cut Can detect a pulseCan detect a pulse

Vein Vein Smaller than Smaller than

arteriesarteries Carry blood back to Carry blood back to

the heart.the heart. Closer to skinCloser to skin

• Appear ‘bluish’Appear ‘bluish’• Do not spurt w/ cutDo not spurt w/ cut• Cannot detect a Cannot detect a

pulsepulse

CapillaryCapillary

Smallest of the Smallest of the vesselsvessels MicroscopicMicroscopic Connect arteries to Connect arteries to

the veins.the veins. Gas exchange takes Gas exchange takes

placeplace• OO22

• COCO22

Conclusion Conclusion The circulatory system in dentistry is The circulatory system in dentistry is

related to overall health, oral related to overall health, oral infection, and administration of infection, and administration of medications.medications.

Any questions?????? Any questions??????

1. What are the three 1. What are the three types of vessels?types of vessels?

2. Order the three 2. Order the three types of vessels from types of vessels from the smallest to the the smallest to the largest unitlargest unit

3. What are the three 3. What are the three parts of the parts of the circulatory system?circulatory system?

4.4. What is the What is the difference between difference between pulmonary and pulmonary and systemic circulation?systemic circulation?

5.5. What are the three What are the three layers of the heart?layers of the heart?