The Circulatory System 22/09/2018 The Circulatory System

Words – energy, carbon dioxide movement, oxygen, food, circulatory Body systems 22/09/2018 The RESPIRATORY SYSTEM: takes in _____ & gives out __________ The ___________ SYSTEM: transports oxygen and food around the body The SKELETAL and MUSCULAR systems: use the _____ from food to allow ________ The DIGESTIVE SYSTEM: takes in & processes ________ Words – energy, carbon dioxide movement, oxygen, food, circulatory

The Heart is the organ that pumps blood around the body. 22/09/2018 The Heart is the organ that pumps blood around the body. It is a muscle that works continuously for our whole life

A real heart is about fist size 22/09/2018 A real heart is about fist size

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The Heart 22/09/2018 4. Oxygenated blood from the lungs enters through the pulmonary vein into the left atrium 1. Deoxygenated blood (i.e. blood without oxygen) enters through the vena cava into the right atrium 2. It’s then pumped through the tricuspid valve into the right ventricle 5. It’s then pumped through the bicuspid valve into the left ventricle 3. It’s then pumped through the semi-lunar valve up to the lungs through the pulmonary artery 6. It’s then pumped out of the aorta to the rest of the body

A heart attack happens when a narrowed coronary artery becomes blocked 22/09/2018 A heart attack happens when a narrowed coronary artery becomes blocked

The Circulatory system 22/09/2018 The circulatory system is responsible for pumping ______ around the body. We need blood to be taken around the body because blood contains ________ and _______. These are needed so that all the ____ in our bodies can produce _____ through _________. The main part of the circulatory system are the _____, the blood and the blood vessels. Words – energy, heart, blood, glucose, respiration, oxygen, cells

Circulation 22/09/2018 1) Blood gets pumped from the heart to the lungs and picks up oxygen 2) The blood is then taken back to the heart… 3) The heart pumps the blood to the intestine (where oxygen and glucose are removed)… 5) After the oxygen and glucose have been removed for respiration the blood is sent back to the heart and starts again 4) … and to the rest of the body (where oxygen is removed)

The “Double Circulatory” System 22/09/2018 1. Deoxygenated blood is pumped from the heart to the lungs 2. The blood receives oxygen and is pumped back to the heart See animation 4. The oxygen leaves the blood to be used for respiration in the body and the blood goes back to the heart 3. The oxygenated blood is then pumped to the rest of the body

BLOOD VESSELS Arteries, veins and capillaries 22/09/2018 BLOOD VESSELS Arteries, veins and capillaries Arteries carry high pressure blood away from the heart. They have smaller lumen and no valves. Capillaries have thin walls (one cell thick) to allow glucose and oxygen to pass through. Also used to connect arteries to veins. “Lumen” Veins carry low pressure blood back to the heart. They have thinner, less elastic walls and have valves to prevent backflow of blood.

The four parts of blood 22/09/2018 1. RED BLOOD CELLS – contain haemoglobin and carry ______ around the body. They have no _______ and a large surface area. 2. PLATELETS – small bits of cells that lie around waiting for a cut to happen so that they can ____ (for a scab). 3. WHITE BLOOD CELLS – kill invading _______ by producing _________ or engulfing (“eating”) the microbe. These three are all carried around by the PLASMA (a straw-coloured liquid). Plasma transports CO2 and ______ as well as taking away waste products to the ______. Words – antibodies, clot, kidneys, oxygen, nucleus, glucose, microbes.