Story In the middle of the night, a truck rolls rapidly through the darkness. Loaded with fresh fruits and vegetables, the truck is headed for the super market. The driver steers off the interstate and onto a smaller highway. Finally, after driving through narrow city streets, the truck reaches its destination. As dawn begins to break, store workers unload the cargo. They work quickly because other trucks-

Story Cont. Carrying meats, canned goods and freshly bakes breads- are waiting to be unloaded. And while workers fill the store with products to be sold, a garbage truck removes yesterday's trash. All these trucks have traveled long distances over roads. Without a huge network of roads, big and small, the supermarket’s couldn’t stay in business.

Movement of Materials Like the _______that link all the parts of the country, your body has a “___________” network, called the ___________system. This consists of the________, blood________, and__________. The circulatory system carries _________substances to _______and carries ________products away from cells. ________also contains cells that ________disease roads highway circulatory heartvessels blood neededcells waste fightBlood

Needed Materials Substances that need to get _______one part of the body to _________are carried by________. Ex. Blood carries oxygen from your lungs to your body. from another blood

Waste Products The circulatory system also ________up ________products from_______. Ex. When cells use glucose (sugar), they produce carbon dioxide as a waste product. The carbon dioxide passes from the cells into the blood. The circulatory system then carries the carbon dioxide to the lungs, where it is exhaled. picks wastecells

Disease Fighters The circulatory system also __________cells that attack ____________causing microorganisms. This helps keep you from getting_______. If you do get sick, these disease fighting blood cells will kill the microorganisms to help you get well. transports disease sick

Heart Hollow ____________organ that ________blood throughout the body Made of __________muscle About the size of your_________ Located in ________of chest, behind breastbone, inside the ribs Each time the heart_______, it pushes _________through blood vessels During your lifetime, your heart may beat over 3 __________times, and pump enough blood to fill over _____competition size swimming pools muscularpumps cardiac fist center beats blood billion 30

Heart

Heart’s Structure Heart has ______sides—_______________ Each side has ______compartments or _________ upper and lower Upper chambers are called _________or atria The atrium receives blood that comes INTO the heart. Lower chambers are called___________ Ventricles pump blood OUT of the heart The atria are ____________from the ventricles by_______ Valves are flaps of tissue that prevents blood from flowing backward twoRight and Left two chambers- Atrium Ventricles separated valves

Hearts Structure _____________: Group of cells in _______atrium that regulates the ________of the heart. ________atrium: __________blood from body. ______in oxygen, ________in waste (carbon dioxide). Right _________: during contraction, pumps oxygen _________blood to the_________ right beating Pacemaker Rightreceives Lowhigh ventricle poorlungs

Heart’s Structure Left __________: oxygen _______blood moves the lungs to here during relaxation. Left ventricle: pumps oxygen rich blood to ______parts of body. Septum: muscular _______that separates heart from right to left sides. Aorta: _________blood vessel in the body. Carries blood from ______ventricle to the body. Atrium rich all wall largest left

Heart STOP

How the Heart Works Your heart goes through ______main phases Relaxation (muscle): when the heart _____with blood Contraction (muscle): _______blood forward When the heart muscle relaxes, blood flows into the chambers, the atria contract, sending blood through valves into the ventricles. Next the ventricles contract squeezing blood out to the body. two fills pumps

This ALL happens in less than a second!

Regulation of Heartbeat The ___________sends out __________that makes the heart muscle contract. The pacemaker ____________receives messages about the body’s oxygen needs and __________the heart rate to match. Ex. heart beats much faster when exercising versus sitting due to body needing more oxygen pacemakersignals constantly adjusts

Blood Vessels Your body has ________kinds of blood vessels. Arteries: carries _____________blood away from the heart From the arteries, blood flows into capillaries Capillaries: tiny vessels (one cell thick) where substances are _____________between the blood and body cells Oxygen, glucose one way (arteries). waste the other (veins) From capillaries, blood flows into veins _________: vessels that carry ______________blood back to heart three oxygenated exchanged Veins deoxygenated

Brainpops atorysystem/ atorysystem/

Fact If you lightly touch the inside of your wrist, or the side of your throat, you can feel the artery rise and fall repeatedly---this is your pulse.

atherosclerosis atherosclerosis is a buildup of fatty deposits within the walls of arteries. Sclerosis refers to hardening of a tissue. sometimes encounter a similar word, arteriosclerosis, which means literally "hardening of the arteries." Some hardening of the arteries often occurs naturally with aging, but it can be made worse by the accumulation of various kinds of deposits, including calcium.

Atherosclerosis Atherosclerosis, like arteriosclerosis, causes arteries to lose their flexibility. Explain that atherosclerosis is a specific form of arteriosclerosis, and it is the term that is nearly always used in relation to the cause of most heart attacks and strokes.

Discussion Questions What does the circulatory system do? It carries food, water, oxygen, and other important materials to cells and tissues throughout the body; it also carries away wastes produced by all the other chemical reactions that take place inside cells. What does the heart do? It pumps blood through the circulatory system. How do the heart and the blood vessels work together? The heart pumps blood; the vessels carry blood.

Discussion Questions What does coronary circulation do? Coronary circulation supplies oxygen-rich blood to all the cells of the heart. How do the circulatory system and the respiratory system work together to maintain homeostasis? The circulatory system delivers oxygen from the respiratory system to other parts of the body and transports waste products (carbon dioxide) from the other parts of the body to the respiratory system for removal from the body.

Blood Made of ________components: red blood cells (RBC), white blood cells (WBC), plasma, platelets. Red blood cells: picks ____oxygen from _________and takes to rest of body Produced in bone marrow four uplungs

Blood White blood cells: produced in ________marrow. Your bodies ________fighter Less WBC--One WBC to every RBC bone disease

Plasma Where have you heard this word? plasma TVs, plasma used in transfusions, plasma membrane used instead of cell membrane, or other scientific uses. the plasma used in a plasma TV refers to a fourth state of matter that contains a huge number of electrically charged particles. It is another form of a gas. Do you think the kind of plasma in a TV is the same as the plasma in blood? No, the plasma in blood is a liquid.

Blood Plasma: Most of the material ______________travels on plasma. _____________in color due to protein molecules transported Yellowish

Blood Platelets: play important part in ____________blood clots. Ex. When you cut your finger forming

Brainpop / /

Discussion Questions What does the blood do? Blood transports substances (oxygen, carbon dioxide, nutrients, hormones, waste materials); fights infection and helps heal wounds; and helps regulate body temperature. How do the parts of blood differ? Answers should reflect an understanding that the different parts of blood have different roles, have different shapes, and are present in different amounts. Plasma is the liquid part of blood that transports the other parts.

Discussion Questions What kinds of antigens are found in AB+ blood? A, B, and Rh antigens are found in AB+ blood.

Bill Nye