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Walk In Question

Explore the circulatory system and learn about the different types of blood vessels. Discover how the heart and lungs work together to transport oxygen-rich blood throughout the body. Understand the importance of maintaining healthy blood pressure.

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Walk In Question

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  1. Walk In Question What do you think a blood vessel is? Can you name any types of blood vessels? The 2nd quarter homework project due date is in 10 days.

  2. Circulatory System: Heart, Blood, Blood Vessels

  3. Heart and Lungs Work Together (Review) • The body takes in air through the lungs and delivers oxygen to the alveoli. • The smallest blood vessels, called capillaries, pick up oxygen. • They move the oxygen-rich blood through arteries to every cell in the body.

  4. Review cont. • The cells put carbon dioxide into the blood. • Oxygen-poor blood (that contains CO2) goes back to the heart. • The heart pumps the blood back to the lungs, which breathe out the CO2. • The lungs breathe in more air and oxygen, and the heart pumps it to the body parts again.

  5. Structures in the Circulatory System • Heart – pushes blood throughout the body. • Two pumps – one on right side, one on left side. • Left side – pumps oxygen-rich blood to entire body • Right side - pumps oxygen-poor (used) blood to the lungs to receive oxygen. • Has valves to open and close.

  6. Heart Pumping • Chambers - each side of heart divided into 2 parts – right and left atrium and ventricle. • All blood is red, but oxygen rich blood is a much brighter and lighter shade of red. (charts usually show oxygen-poor blood in blue) • Blood carries oxygen and nutrients to all cells in the body.

  7. Blood • Blood –a fluid that carries all materials and wastes, delivers oxygen and removes CO2.made up of plasma, redblood cells, white blood cells and platelets. • Blood carries oxygen and nutrients to cells of the body. • Plasma 60% of blood is plasma (and 92% of plasma is water!) – A fluid that contains proteins, glucose, hormones, gases and other substances dissolved in water. • White Blood cells – help body fight infection. • Red blood cells – more numerous, pick up oxygen in lungs and transport it throughout body. • Platelets – large, solid cell fragments, help form blood clots. Clotting keeps us from losing too much blood from a cut.

  8. Different Blood Types • Each red blood cell has special proteins on its surface. The group of surface proteins determines blood type. • There are 2 blood-type proteins – A & B. • A person with A proteins in blood – Type A • A person with B proteins in blood – Type B • Some people have both proteins – Type AB • Some people have neither proteins – Type O 4 Types of Blood – A, B, AB, O

  9. Blood Pressure • Blood Presssure – the force produced when the heart contracts travels through the body. • The pressure exerted by blood on the veins and arteries. • Must maintain healthy blood pressure to get blood to all parts of body. • Too low – some cells will not get oxygen and other materials. • Too high – force will weaken the vessels and require the heart to work harder to push the blood through.

  10. Blood Vessels • Blood vessels – tube-shaped structures that move blood all over the body. • Arteries – carry oxygenated blood away from heart to the rest of the body – strong, thick walls • Veins – carry blood back to the heart, thinner; have a one-way valve. • Capillaries – narrow, smallest blood vessels, they connect arteries with veins.

  11. Difference between arteries and veins • Arteries go out AWAY from the heart, and veins go INto the heart.

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