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Do Now 1. Cellstissueorgansorgan systemsorganisms 2. An organ system is a group of organs working together to perform the same function, like the respiratory system 3. The lungs, which exchange inhaled oxygen for carbon dioxide to be exhaled 4. The brain, which tells the body what to do 5. Brings in oxygen and removes carbon dioxide Circulatory System SWBAT define and describe the circulatory system and how it works with the respiratory system The Circulatory System Also known as the cardiovascular system The circulatory system moves all substances, such as oxygen and nutrients, to or from cells where they are needed or produced, responding to changing demands. The circulatory system is the body’s “delivery service” Parts of the Circulatory System Heart: the pump that keeps blood moving trough blood vessels Blood: thick liquid that transports nutrients and wastes Plasma: makes up blood, mostly water Platelets: give the blood its thickness Red blood cells: transports oxygen White blood cells: helps fight infections Blood vessels: transport blood throughout the body Heart The main organ of the circulatory system Pumps the blood throughout the body Blood BLOOD 55% PLASMA WHITE BLOOD CELLS RED BLOOD CELLS PLATELETS Plasma 55% of the blood, that is made up of 90% water. Other 10% is composed of broken down nutrients (minerals, proteins, cholesterol,et) Suspends and carries blood cells; why blood is liquid and runny Platelets Give the blood its thickness, and helps in blood clotting. If you get a cut, your platelets are what begin to heal the area with scabbing. Red Blood Cells Red blood cells carry the oxygen The have HEMOGLOBIN that can BIND to the oxygen and then carry it. White Blood Cells White blood cells are types of immune cells that fight infectious disease. Blood Vessels Vessels transport blood throughout the body VESSELS are the VEHICLES for blood to transfer Respiratory & Circulatory Systems are BFFs The respiratory system brings in oxygen to the body and releases carbon dioxide Then, that oxygen enters and the carbon dioxide exits the circulatory system and travels through the body through the blood The respiratory and circulatory systems show us that organ systems are not independent, BUT WORK TOGETHER for the benefit of the body Why is blood red? First off, blood is always red, even if veins may look blue Sometimes blood is more red than at other times, and can appear kind of purple The more oxygen blood has, which it gets from the lungs the brighter red the color How does our blood travel? http://www.kscience.co.uk/animations/blood_sy stem.swf THINK-PAIR-SHARE 1. At what point in the previous graphic did the blood turn from a darker color to a brighter red? Why did this change occur? 2. The farther the blood traveled after turning bright red, the darker the color turned. Why? 3 Important Facts Complete the bottom box on your notes page to sum up what you think were the most important parts of today’s lesson Dear Tim & Moby http://www.brainpop.com/health/bodysystems/ circulatorysystem/ Turn to the page titled Brain Pop Annotate the questions before we watch We will answer the questions after the video! Independent Practice Noise level o and independently Answer the questions, complete the vocab sentences, and complete the frayer models