Do Now: Can you use the stethoscope to hear your heart beat? Count how many times it beats a minute. Hold your breath. Does your heart beat? Is there any change? Why does it beat? Why do you need heart to pump? Note observations in your new packet inside the cover.

Circulatory System The transportation system of the body Circulatory comes from the word “circle” Blood circles the body: heartlungsheart Body cells Another name for the circulatory system is the cardiovascular system

Major Organs and Tissues of the Circulatory System Heart Blood Vessels Blood

Why is Circulation Important? The circulatory system transports oxygen and food to the brain, feet, muscles, and every single part of the body. It is very important that the circulatory system in the body keeps going all the time. If it stops, even for a short time then the body will very quickly die.

Three Functions of the Circulatory System: 1. To move oxygen and nutrients to all cells of the body 2. To move carbon dioxide and other wastes out of the cells. 3. To fight disease circulation song circulation song

Do now: This is a picture of the blood vessels in the body. Where do you see the most blood vessels? Where do you see fewer blood vessels? Why do you think this is?

Circulation movement of blood through body

Blood Vessels 3 Kinds of blood vessels Arteries Veins Capillaries

Arteries Arteries ALWAYS carry blood AWAY from the heart

VEINS carry blood TO the heart

CAPILLARIES connect arteries to veins artery vein Capillaries are where cells connect to blood. Oxygen, and nutrients are exchanged for carbon dioxide and wastes.

Special Veins and Arteries The Aorta is the largest artery in the body -leading from the heart The Vena Cava is the largest vein in the body, and leads to the heart The pulmonary artery and pulmonary vein connect the heart to lungs

Two truths and a lie The main parts of the circulatory system are the heart, blood vessels and lungs. Blood in your body is two different colors Arteries always carry blood away from the heart.

What did we learn about the circulatory system with the heart run around? What were the parts we represented? What do cells use up to make energy? How does oxygen get from your lungs to your body cells? What makes blood move? What did we simplify? Cells must always have energy. If it is used up faster it must be replaced faster. This means that the heart must ______________

What is the meaning of the cartoon?

The Heart The heart has 4 chambers: atrium ventricle

Parts of the Heart Atrium - upper chamber septum - thick tissue that separates left and right side of heart valve -flap of tissue ventricle - lower chamber of heart

Heart diagram Pulmonary Artery Pulmonary Vein Vena Cava Aorta

Do Now In your packet, describe what is happening on SIDE A of the handout.

Capillaries Side A Oxygenated blood comes from the heart and goes through the organ where it becomes de-oxygenated blood.

Describe what is happening on side B of the handout.

Capillaries Side B Shows blood picking up waste and carbon dioxide from the organ and blood giving the organ water, nutrients and oxygen. The blood stays in the capillary. Water can go both ways.

Cardiovascular Blood Flow, Heart anatomy Coronary arteries Step through blood flow Blood flow Circulation How the heart works /index.html Click Cardiovascular, then blood flow electric and also heart anatomy and anterior heartbeat

Do Now: INB p 63

Circulatory system matching 1. E 2. G 3. I 4. A 5. F 6. C 7. B 8. J 9. D 10. H

Pulmonary artery - carries blood from heart to lungs

Blood is a liquid tissue Blood is a mixture- part liquid and part solid Plasma is liquid part of blood

Red Blood Cell- contains hemoglobin (iron compound) which carries oxygen

White Blood Cells fight disease

Platelets - form clots

Gas Exchange The pulmonary blood vessels take the blood from the heart to the lungs. They drop off wastes and pick up oxygen Then the blood goes back to the heart 94/Gas-Exchange-in-the-Lungs

Extension Grasshoppers have a heart and blood but no blood vessels. How can they survive? Hint: What do blood vessels do and how do you think grasshoppers do this?