The Circulatory The Circulatory SystemSystem

Getting oxygen and nutrients where Getting oxygen and nutrients where they need to be!they need to be!

Circulatory System: The Circulatory System: The Video ClipVideo Clip

Circulatory System: The Circulatory System: The FunctionFunction To deliver oxygen and To deliver oxygen and

nutrients to cellsnutrients to cells To remove wastes from To remove wastes from

cells and deliver to cells and deliver to excretory organs excretory organs (kidneys and lungs)(kidneys and lungs)

Circulatory System: Circulatory System: VocabularyVocabulary OxygenatedOxygenated

Contains Contains oxygenoxygen DeoxygenatedDeoxygenated

Contains little or Contains little or no oxygenno oxygen PulmonaryPulmonary::

Vessels dealing with the LUNGSVessels dealing with the LUNGS SystemicSystemic::

Vessels dealing with the BODYVessels dealing with the BODY CoronaryCoronary::

Vessels dealing with the HEART itselfVessels dealing with the HEART itself

Circulatory System: The Circulatory System: The PartsParts HeartHeart::

Muscle that pumps blood to body AND lungsMuscle that pumps blood to body AND lungs ArteriesArteries::

THICK vessels that carry blood THICK vessels that carry blood AWAYAWAY from heart from heart TO TO lungslungs or TO or TO bodybody

VeinsVeins:: THIN vessels that carry blood THIN vessels that carry blood TOTO heart heart FROM FROM lungslungs or FROM or FROM bodybody

CapillariesCapillaries:: TINY, TINY blood vessels that connect arteries to veinsTINY, TINY blood vessels that connect arteries to veins GAS EXCHANGE OCCURS IN CAPILLARIES!GAS EXCHANGE OCCURS IN CAPILLARIES!

Heart: The Video ClipHeart: The Video Clip

Circulatory System: The Circulatory System: The HeartHeart Pericardium:Pericardium:

Protective sac that surrounds the heartProtective sac that surrounds the heart Myocardium (heart muscle):Myocardium (heart muscle):

Contractions pump blood through heartContractions pump blood through heart Septum:Septum:

Thick wall that separates the two sides of the Thick wall that separates the two sides of the heartheart

Circulatory System: The Circulatory System: The Heart con’t…Heart con’t… Atrium (Atrium (pl. atria):pl. atria):

Two UPPER chambers of the heartTwo UPPER chambers of the heart Right atrium receives blood from the bodyRight atrium receives blood from the body Left atrium receives blood from the lungsLeft atrium receives blood from the lungs

Ventricles:Ventricles: Two LOWER chambers of the heartTwo LOWER chambers of the heart Right ventricle receives blood from the right atriumRight ventricle receives blood from the right atrium Left ventricle receives blood from the left atriumLeft ventricle receives blood from the left atrium

Valves:Valves: Prevent “backflow” of bloodPrevent “backflow” of blood Locations:Locations:

Between atrium and ventricleBetween atrium and ventricle Between ventricles and major arteriesBetween ventricles and major arteries Throughout blood vessels in the bodyThroughout blood vessels in the body

Blood Vessels: The Video Blood Vessels: The Video ClipClip

Circulatory System: Circulatory System: ArteriesArteries Blood vessels that carry blood Blood vessels that carry blood AWAYAWAY from from

the heart to the heart to bodybody or or lungslungs Major arteries:Major arteries:

AORTAAORTA:: Carries Carries OXYGENATEDOXYGENATED blood from blood from LEFT VENTRICLELEFT VENTRICLE to to

the the BODYBODY PULMONARY ARTERIESPULMONARY ARTERIES::

Carry Carry DEOXYGENTATEDDEOXYGENTATED blood from blood from RIGHT RIGHT VENTRICLEVENTRICLE to to LUNGSLUNGS

ONLY ARTERIES IN BODY THAT CARRY ONLY ARTERIES IN BODY THAT CARRY DEOXYGENTATED BLOOD!DEOXYGENTATED BLOOD!

Circulatory System: VeinsCirculatory System: Veins Blood vessels that carry blood Blood vessels that carry blood TOTO heart from heart from bodybody

or or lungslungs Major veins:Major veins:

SUPERIOR VENA CAVA:SUPERIOR VENA CAVA: Carries Carries DEOXYGENATEDDEOXYGENATED blood from blood from UPPER BODYUPPER BODY to the to the

RIGHT ATRIUMRIGHT ATRIUM INFERIOR VENA CAVA:INFERIOR VENA CAVA:

Carries Carries DEOXYGENATEDDEOXYGENATED blood from blood from LOWER BODYLOWER BODY to the to the RIGHT ATRIUMRIGHT ATRIUM

PULMONARY VEINS:PULMONARY VEINS: Carry Carry OXYGENATEDOXYGENATED blood from the blood from the LUNGSLUNGS to the to the LEFT LEFT

ATRIUMATRIUM ONLY VEINS IN BODY THAT CARRY OXYGENATED ONLY VEINS IN BODY THAT CARRY OXYGENATED

BLOOD!BLOOD!

The Blood’s Journey: The The Blood’s Journey: The Video ClipVideo Clip

Diagram of Heart and Diagram of Heart and Blood FlowBlood Flow

(bicuspid)

(semilunar)