The cardiovascular system for demo

The Cardiovascular System

is a two-way circuit that involves

your heart (cardiac)


is a two-way circuit that involves your

blood vessels (vascular)


is a two-way circuit that involves your blood.


It can be compared to a railway system. A

railway system consists of a central

station, train cars and railway tracks.


The cardiovascular system consists of the heart, blood

and blood vessels.


The heart is like the central

station. It is responsible for circulation of

the blood.


The blood is like the train cars, which carries the cargoes of gases, nutrients,

and other substances in the body.


The blood vessels act

like the railway tracks. They

carry the blood to the different

parts of the body.

The Cardiovascular SystemThe word circulate means “to move about.”

Circulation – pumping of blood through the entire body by the heart.

The Cardiovascular System (cont

• The Heart– It consists of four chambers.


• The Heart

• The left and right atria are collecting chambers. They receive the blood and hold the blood until it can enter the ventricles.


• The Heart

• The atria are thin-walled while ventricles are thick walled.


• The Heart

The ventricles are pumping chambers. They pump the blood out of the heart and cause the blood to move around the body


• The Heart

How does the heart pump blood?

The heart muscles squeeze together and push out blood from

inside.


• The Heart

–Your heart is sort of like a pump, or two pumps in one. The right side of your heart receives blood from the

body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body.


• The Heart

–The blood enters into the Right Atrium (RA) and goes to the Right Ventricle (RV) then exits into the lungs where it exchanges carbon

dioxide load for oxygen.


• The Heart

–This oxygenated blood goes back to the heart through the Left Atrium

(LA) then it goes to the Left Ventricle (LV).


• The Heart– Blood flows through the heart in one

direction.– Valves control the blood flow.– The cardiac conduction system controls

the electrical impulses that cause the heart to contract.


• The Heart

The heart contains two types of valves.

The tricuspid valve separates the right atrium from the right ventricle, and the bicuspid valve separates the left atrium and the left ventricle


• The Heart


The tricuspid and bicuspid valves ensure the blood flows from the atria to the ventricles.


• The Heart


The other valves are the semilunar valves. They open and permit the entry of blood when ventricles contract.


• The Heart


.


• The Semilunar Valves• The pulmonic valve separates the right

ventricle from the pulmonary artery leading to the lungs.

• The aortic valve separates the left ventricle from the aorta, the body's largest blood vessel.

•

The Cardiovascular System (cont.)

• The Heart (cont.)

– Bicuspid (mitral) valve.

– Tricuspid valve.– Pulmonary valve.– Aortic valve.


• Circulation– Coronary circulation – the circulation

of blood within the heart.

– Pulmonary circulation – the flow of blood between the heart and lungs.

– Systemic circulation – the flow of blood between the heart and the cells of the body.


The blood vessels (vascular)


The blood vessels1.arteries It carries the blood away from the heart.

2.veins –It carries blood back to the heart.

The Cardiovascular SystemThe blood vessels

3. The two largest veins are the superior and inferior vena cavae.The terms superior and inferior do not mean that one vein is better than the other, but that they are located above (superior) and below (inferior) the heart.

The Cardiovascular SystemThe blood vessels superior vena cavae- It carries deoxygenated blood from the upper half of the body to the heart'sright atrium.

http://en.wikipedia.org/wiki/Blood

http://en.wikipedia.org/wiki/Heart

http://en.wikipedia.org/wiki/Right_atrium

The Cardiovascular SystemThe blood vessels De-oxygenated blood means most of the oxygen has been removed by tissues and the blood is darker.

The Cardiovascular SystemThe blood vessels The inferior vena cava is a vein that carries blood from the lower body to the heart. This vein carries de-oxygenated blood.


A network of tiny capillaries connects the

arteries and veins.

The Cardiovascular SystemThe blood vessels Even though they're tiny, the capillaries are one of the most important parts of the circulatory system because it is through them that nutrients and oxygen are delivered to the cells.

The Cardiovascular SystemThe blood vessels In addition, waste products such as carbon dioxide are also removed by the capillaries.


• Blood– Complex mixture

of cells, water, and various proteins and sugars.

– Fifty-five percent is plasma (liquid).

– Forty-five percent is solid.


• Blood Types– Common blood types are O, A, B, and

AB.– Rh-factor is a type of antigen that

causes the body to produce antibodies.

• Rh+ means the Rh factor is present.• Rh– means the Rh factor is not

present.


• Diseases and Disorders– Hypertension.– Stroke.– Arteriosclerosis.– Aneurysm.– Coronary artery disease (CAD).– Heart attack.– Congestive heart failure (CHF).– Anemia, hemophilia, and leukemia.

What the Heart & Circulatory System Do?

• The circulatory system works closely with other systems in our bodies. It supplies oxygen and nutrients to our bodies by working with the respiratory system. At the same time, the circulatory system helps carry waste and carbon dioxide out of the body.

http://kidshealth.org/teen/your_body/body_basics/heart.html#

http://kidshealth.org/teen/your_body/body_basics/heart.html

http://kidshealth.org/teen/your_body/body_basics/heart.html

Students are put in small groups of three or four and are asked to make a life-size drawing of the circulatory system. They trace a member of their group and use their book or the internet to draw the circulatory system, label the necessary parts, and color (unoxygenated blood blue, oxygenated blood red). They must have a title, group members names, and label the following: heart, lungs, vein, artery, brain, capillaries, right ventricle, left ventricle, right atrium, left atrium, and valves.

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The cardiovascular system for demo

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