The Circulatory SystemThe Circulatory System

FunctionFunctionA. Transportation system of the body.

B. Carries oxygen and nutrients. C. Also carries substances called

hormones, which control body processesD .Antibodies to fight invading germs. E. Gets rid of waste materials (CO2).

The heart, the lungs, and The heart, the lungs, and the blood vessels work the blood vessels work together to form the together to form the

circlecircle part of the part of the circulatory system. circulatory system.

3 Kinds of Circulation:3 Kinds of Circulation:

Systemic circulationCoronary circulationPulmonary circulation

1. Systemic Circulation1. Systemic Circulation

The largest part of the circulatory system in which oxygen-rich blood flows to all

organs and body tissues, except the heart, and lungs.

2. Coronary Circulation2. Coronary Circulation

Movement of blood through the tissues of the heart (cardiac muscle only).

3. Pulmonary Circulation3. Pulmonary Circulation

Movement of blood from the heart, to the lungs, and back to the heart again

http://www.youtube.com/watch?v=Rj_qD0SEGGk

Parts of the Circulatory Parts of the Circulatory SystemSystem

Divided into three major parts:◦1.The Heart ◦2.The Blood ◦3.The Blood Vessels (arteries & veins)

The HeartThe HeartA.Size of your fist B. Made of specialized striated cells called

cardiac muscle. C. Located in the left center of the chest

and protected by the sternum.D. Divided into 4 chambers

The HeartThe Heart

1. Atria (atrium): chambers in the top of the heart which receive blood from other areas of the body

2. Ventricles bottom parts of the heart, pump blood to different parts of the body

3. Pumps about 4-5 liters of blood per minute about 9,000 liters a day

4. It beats between 60-160 beats per minute

Blood Vessels:Blood Vessels:Hollow tubes that circulate your blood

Three Kinds of Blood Vessels Three Kinds of Blood Vessels ArteriesVeinsCapillaries

A. ArteriesA. Arteries1. Carry blood AWAY from the heart2. Very muscular3. Main artery called the aorta is the

largest arteryAorta divides and branches into many

smaller arteries 4. The only artery that does not carry

oxygenated blood is Pulmonary artery.

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Have strong, muscular walls

The inner layer is very smooth so that the blood can flow easily

B. CapillariesB. Capillaries1. Connect arteries & veins2. Are the smallest of the blood vessels3. Very thin only one cell thick4. Found all over body5. Where exchange of oxygen, waste and

other transfers occur between the blood vessels and the tissue.

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Oxygen & Nutrients dropped off to tissue while waste & CO2 picked up and taken into blood then move into viens

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C. VeinsC. Veins1. Carry blood back to the heart2. Only vein that does not carry un-

oxygenated blood is the pulmonary vein3. Walls are thinners then arteries4. Have small valves to prevent blood

from flowing backwards.5. Largest vein is the Vena Cava.

VeinsVeinsReceive blood from the capillariesTransport waste-rich and oxygen-poor

blood back to the lungs and heart Allow blood to move in one directionBlood is usually purplish due to low

oxygen levels (de-oxygenated)

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Valves are located inside the veins. The valves only allow blood to move in one direction.

Blood FlowBlood Flow

Heart Lungs Heart Body

http://www.youtube.com/watch?v=mH0QTWzU-xI

AORTA - artery

Vena Cava - vein

Atria

Ventricles

Unoxygenated blood comes in from the top of the body through the superior vena cava andUnoxygenated blood comes in from the lower body though the inferior vena cava.UNoxygenated blood enters the atrium on the right side of the heart.

The atrium

contracts and the tricuspid

valve opens, forcing

the blood down into

the ventricle.

The ventricle contracts. This forces

the unoxygenated blood through the pulmonary valve and into the pulmonary

arteries.

The right pulmonary artery takes the

unoxygenated blood to the right lung.

The left pulmonary artery takes the

unoxygenated blood to the left lung.

THE PULMONARY ARTERIES ARE THE

ONLY ARTERIES THAT CARRY

UNOXYGENEATED BLOOD.

Oxygenated blood from the right lung returns to the heart

through the right pulmonary vein.

Oxygenated blood from the left lung

returns to the heart through the left pulmonary vein.

THE PULMONARY VEINS ARE THE

ONLY VEINS THAT CARRY

OXYGENATED BLOOD.

Oxygenated blood then

enters the left atrium.

The left atrium contracts. This forces

the oxygenated

blood through the mitral (bicuspid)

valve into the left ventricle.

Left ventricle contracts and Oxygenated

blood is forced into the aorta to be carried to the rest of

the body.

Oxygenated blood is carried to all body cells where oxygen

diffuses into the cells and carbon dioxide diffuses into the blood.

Blood carrying carbon dioxide then returns to

the heart.

And the cycle

begins again.

http://www.youtube.com/watch?

v=0oNabrnXR68&NR=1

Meanwhile…Meanwhile…

While the blood is moving oxygen

and carbon dioxide around, it is also moving nutrients,

other wastes, hormones, and

antibodies at the same time.

http://www.youtube.com/watch?v=P_d0ykpzQgYhttp://www.youtube.com/watch?v=q0s-

1MC1hcE&feature=related

Close up of heart valveHeart sounds are made by the valves

as they open and close

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Get out ISN so we can finish Notes Get out ISN so we can finish Notes on Circulatory Systemon Circulatory System

Write in Planner-Finish notes & brainpop video/quiz-Homework due Thursday!!

BloodBloodhttp://www.youtube.com/watch?http://www.youtube.com/watch?v=4GUYdaM3QIY&feature=relatedv=4GUYdaM3QIY&feature=related

A. Responsible for carrying food & oxygenB. There is about 5 liters of blood in the

average size adult human bodyTravels through thousands of miles of

blood vesselsCarries nutrients, water, oxygen and

waste products to and from your body cells.

Made up of liquids, solids and small amounts of oxygen and carbon dioxide.

BloodBlood

1. Plasma1. PlasmaA. Plasma is the liquid part of the blood

made up of mostly waterB. About half of your blood is made of

plasmaC. Nutrients, minerals, oxygen are

dissolved and carried to body cells, waste from body cells is also carried

Plasma is made in the liver.

PlasmaPlasma

Red Blood CellsRed Blood CellsRBC are made in the center of long bonesContain hemoglobin that helps the RBC to

carry oxygen to all parts of body. About 5,000,000 Red Blood Cells in ONE

drop of blood. Takes carbon dioxide and transports it

back to the lungs

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White Blood CellsWhite Blood CellsWhite blood cells protect the body from

germsAre part of the immune systemDefend body against bacteria, viruses,

foreign substancesAttack and destroy germs when they

enter the body

PlateletsPlatelets

Platelets are blood cells that help stop bleeding

Help clot blood when a person is cut.

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Blood TypesBlood Types

Blood TypesBlood Types

The universal donor is O BloodThe universal recipient is AB BloodBlood transfusionType A can receive Type A or Type OType B can receive Type B or Type )Type AB can receive Type A, Type B, Type

AB or Type OType O can only receive Type O