Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
What is the Circulatory System? SYSTEM Is a group of a smaller parts working together to get a job done Example: BODY’S TRANSPORTATION SYSTEM Body’s transportation system=circulatory system Moves food & oxygen each cell Takes away cell’s wastes Includes:Heart Blood Blood vessels BLOOD Blood Plasma RBC WBC Platelets PLASMA Liquid & Biggest part of your blood – makes up a little more than half of the blood Carries food to cells. Example: cells depend on blood’s plasma to carry food & water to them & carries waste away. It also carries adrenaline – a chemical your heart & muscles What’s the color of your blood ? Green ? Blue ? Yellow ? RED BLOOD CELLS (RBCS) Cells need oxygen to get energy from food Red blood cells carry oxygen Color: Bright light when they are carrying oxygen Dark red after they give the oxygen WHITE BLOOD CELLS Protect your body against germs and harmful things HOW? 1. Wrap around and break down germs 2. Make chemicals that kills germs When body needs to fight infection More or Less WBCs ? MORE Their number always change PLATELETS WBCs and Platelets make a very small fraction of the blood change They are pieces of cells that float in the blood 1. When you get a wound, platelets clump together at the wound or cut to stop the bleeding TYPES OF BLOOD CELLS RBCs WBCs Platelets Form Discs with a dimple on each side Change size and shape as they work. Not complete cells Function Carry oxygen to Protect your the rest of the body from germs body and other harmful things. Form blood clots Disorder Sickle anemiaa disease where RBCs have a shape of a crescent moon and they DO NOT carry oxygen anymore. Might form an embolism if it moves and block a blood vessel In a type of cancer known as leukemia WBCs do not form correctly and their numbers increase BLOOD VESSELS Are thought of as highway your blood uses to move through your body. KIND OF BLOOD VESSELS Blood vessels Arteries Capillaries Veins ARTERIES Blood vessels that carry blood AWAY from your Heart Have thick, muscular walls that stretch when heart pushes blood Branch into smaller and smaller tubes CAPPILARIES Smallest kind of blood vessels- Connect arteries & veins If you put them side by side 10 of these make one hair Gases can pass through their walls Oxygen : from BloodCapillariesCells CO2 and waste: Cells Capillaries Blood VEINS Blood vessels that carry blood FROM cells to the Heart VALVES Veins have Valves. But Arteries and capillaries Do not They are flaps that act like “Doors” to keep blood flowing in one direction. Valve opens when blood flows to the Heart Valve close when blood flow away from the Heart PARTS OF HEART The Heart is made up of 2 sides. Heart Right side Left side PARTS OF HEART Right Side Pumps blood to lungs (to get oxygen and release CO2). Then, to the : Left Side which Pumps blood through arteries to the body. PARTS OF HEART Right Side Made up of 2 parts: 1. Upper part atrium 2. Lower part ventricle Left Side Made up of 2 parts: 1. Upper part atrium 2. Lower part ventricle Ventricle is larger & more powerful than Atrium JOURNEY OF THE BLOOD 1. 2. 3. 4. 5. Blood containing wastes & CO2 flows from body right atrium Right atrium contracts *squeezes blood*right ventricle Right ventricle contracts*pumping blood*artery lungs Blood containing oxygen flows in veins from lungs left atrium Goes to the body through the left ventricle