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Circulatory System

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by

Our Health Group

on 24 September 2012

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Transcript of Circulatory System

Circulatory System The Little Blood Drop By: Stephanie, Adriana, & Dominic A little blood drop was born in the bone marrow of a human body. He gets to travel throughout the body every day as his job. His name was Dexter. He has many brothers and sisters who were also created in the bone marrow. He travels through the veins to the heart. The cells inside of Dexter and his siblings are created in the bone marrow inside the cranium hospital (a.k.a. the brain.) Blood can also be made in vertebrae , ribs, pelvis, skull, sternum , and parts of the humerus and femur . The cells inside of Dexter and his siblings are created in the bone marrow inside the cranium hospital (a.k.a. the skull) Blood can also be made in vertebrae, ribs, pelvis, sternum , and parts of the humerus and femur . Bone Marrow Blood being created <-- Inside Dexter and one of his siblings combined there are about one billion red blood cells , and, for every 600 red blood cells, there are about 40 platelets and one white cell. He started off as a baby stem cell and... grew up to be a giant drop of blood. Although Dexter appears to be red, he is actually composed of yellowish liquid called plasma and billions of cells. When Dexter doesn't have any oxygen he is blue, when he does have oxygen he is red. Oxygenated Deoxygenated After the hospital, Dexter is taken to his home with his siblings. Superior Vena Cava ---> He enters into the right side of the heart through the Superior Vena Cava. The Superior Vena Cava is a vein that collects blood from the upper half of the body. --> Right Atrium ---> After Dexter enters the Superior Vena Cava he goes into the right atrium. The right atrium is the upper right hollow chamber of the heart hat collects blood as it enters the heart and before it is pumped into the ventricles. Dexter's home is the right atrium. Dexter is a delivery man. When the right When the right atrium contracts, Dexter goes to work by going through the tricuspid valve and into the right ventricle. When the right ventricle contracts, Dexter is pumped through the pulmonary valve, into the pulmonary artery and into the lungs. <-- Right Ventricle <----Pulmonary Valve <-- Pulmonary Artery The Pulmonary Artery going to the right takes Dexter to the right lung and the pulmonary artery going to the left goes to the left lung. In the lungs, Dexter picks up.... Right Atrium --> Tricuspid Valve --> Right Ventricle --> oxygen... water... and nutrients. Dexter then delivers oxygen to the pulmonary vein, and runs through the left atrium. He delivers water to the mitral valve and picks up some carbon dioxide, sprints through the left ventricle , and delivers nutrients to the aorta. The blood pressure is really helping to push Dexter through the blood vessels today! Dexter then goes into the little capillaries, which are.... Dexter then goes into the little capillaries, which are tiny blood vessels whose walls are so thin that only oxygen, nutrients, and waste products flow through them. Arteries and veins are connected by capillaries. In the capillaries Dexter delivers oxygen to the rest of the body because the blood vessels go everywhere in the body. When Dexter's day is over he has gone around the body about 100,800 times. He goes home through the inferior vena cava and into the right atrium. Inferior Vena Cava--> <-- Right Atrium He pumps home to his wife Dolly and kids Dylan and Daisy. Dylan & Daisy Dolly As his job he is part of the circulatory system. The purpose of the circulatory system is to distribute blood and other materials to all parts of the body, to fight infections, and to transport heat and maintain the body’s temperature. The different parts of Dexter all have a purpose:
Red Cells-carry oxygen to and from the heart.
White blood cells-help the body to fight infection and ailment.
Platelets-help to stop bleeding and create scabs.
Plasma-transports different nutrients, hormones, and proteins. Red Cells-carry oxygen to and from the heart. Blood Type A- you have A antigens on the surface of your red blood cells and B antibodies in your blood plasma. Blood Type AB- you have both A and B antigens on the surface of your red blood cells and no A or B antibodies at all in your blood plasma. Blood Type O-you have neither A or B antigens on the surface of your red blood cells but you have both A and B antibodies in your blood plasma. The Different Blood Types Are: Blood Type B- you have B antigens on the surface of your red blood cells and A antibodies in your blood plasma. Some blood types can be put together and some cannot. Blood Type 'O' can donate red blood cells to anyone. It is an universal donor. Blood Type 'A' can donate red blood cells to A's and AB's Blood Type 'B' can donate red blood cells to B's and AB's Blood Type 'AB' can donate only to other AB's , but can receive from all others. Since Dexter and his family members are all in the same human body they are all the same blood type. The different types of blood are determined by
the presence or absence of certain antigens. Antigens are substances that can trigger an immune
response if they are foreign to the body. Since some antigens can trigger a person's immune system to
attack the transfused blood, safe blood transfusions is important. Not only are there A and B antigens, but there is another one that we call RH Factor. RH Factor can be either present (+) or absent ( – ). Rh-negative blood can be given to Rh-negative. Rh-positive humans can receive from both Rh-positive and Rh-negative humans. The heart is always related to the size of your fist because your heart and fist grow at the same rate. A blood transfusion is a relatively simple medical procedure during which a patient receives blood through an IV because either their blood doesn't have enough oxygen or to prevent fatigue. If Dexter and all the blood drops around him do not have enough oxygen and is supposed to be oxygenated, then the human may have to get a blood transfusion. A human's blood pressure is determined by two numbers,
systolic and diastolic pressure. Both the systolic and diastolic pressure measurements are important
– if either one is raised, it means you have high blood pressure (hypertension). The systolic pressure is the maximum pressure in an artery at the
moment when the heart is beating and pumping blood through the body. The diastolic pressure is the lowest pressure in an artery in the
moments between beats when the heart is resting. Systemic Circulation- Starts at the left ventricle and ends at the right atrium. Carries oxygenated blood to the rest of the body. Pulmonary circulation - carries blood between the heart and the lungs. It begins on the right ventricle and ends on the left atrium. Deoxygenated blood leaves the right ventricle by the pulmonary artery and is carried to the capillaries of the lungs. At the end of the day Dexter has gone through two different types of circulations, pulmonary and systemic. Works Cited
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