5 Parts of the Circulatory System Divided into three major parts:The HeartThe BloodThe Blood Vessels
6 The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system.
7 Circulation Two parts Heart acts as double pump Blood from the right side pump is dark red and low in oxygen (oxygen-poor)
8 CirculationTravels through pulmonary arteries to lungs where it gets fresh oxygen and becomes bright redBlood from lungs through pulmonary veins back to the heart's left side pumpPumped out into the body
10 Hollow tubes that circulate your blood all throughout your body. Blood VesselsHollow tubes that circulate your blood all throughout your body.
11 Three Kinds of Blood Vessels ArteriesVeinsCapillaries
12 Arteries Carry blood AWAY from the heart Heart pumps blood Main artery called the aortaAorta divides and branchesMany smaller arteriesEach region of your body has system of arteries supplying it with fresh, oxygen-rich blood.
13 ArteriesTough on the outside, very thickSmooth on the insideMuscular wall helps the heart pump blood
14 Have strong, muscular walls, and are very thick The inner layer is very smooth so that the blood can flow easily
15 CapillariesAllows food and oxygen to be released to the body cellsCarbon dioxide and other waste products returned to the bloodstreamIt is where exchanges occur
20 Veins Carry blood to the heart Receive blood from the capillaries Transport waste-rich/ oxygen-poor blood back to the lungs and heartValves are located inside the veins to allow blood to move in one direction
21 Veins are a medium thickness. Valves are located inside the veins.The valves only allow blood to move in one direction.
23 The Heart Size of your fist Thick muscular walls Divided into two pumpsEach pump has two chambersUpper chamber - atrium receives blood coming in from the veinsLower chamber - ventricle squeezes blood out into the arteries
25 Close up of heart valve Heart sounds are made by the valves as they open and close
26 BloodCarries nutrients, water, oxygen and waste products to and from your body cells.Helps regulate temperature and water content.Delivers proteins so cells can repair or be replaced.Helps fight infections..
27 BloodRed blood cells carry oxygen from the lungs to all the cells of the body.Takes carbon dioxide and transports it back to the lungsAbout 5,000,000 Red Blood Cells in ONE drop of blood.