Catalyst 4 minutes! • How big is your heart? • The size of a strawberry • The size of a fist • The size of a ping pong ball • The size of a bag of Flamin’ Hot Cheetos • How many miles per day does bloodtravel in the body? • True or False? A pint of bloodis equivalent to a pound, so people lose a pound when they donate blood. • Use 2 fingers to find your heart rate or pulse at your carotid artery. Record the # of beats you observe in 30 seconds! 12,000
Miss Andrews 414-301-2465 @scientificmiss www.scientificmiss.weebly.com firstname.lastname@example.org Mondays & Wednesdays 3:45 – 4:30 pm • LuNcH! • ELO BUS passes Villarica, Chile, South America
SDHSexpectations • Be respectful. • Be focused. • Be prepared.
Nothing Good Comes Easy North Star “We don’t have a choice. We have to reach that North Star.” goal - driven 80% MaSTeRy! problem solvers
100.Benjamins • 1: Raise a hand • 1: Exemplary answer in sentence • 1: Exemplary answer with thought • 1: Demonstrate “North Star” traits • 3: 100% seated before the bell • 3: “Ready for your attention” • 3: Lab /activity clean up • 5: 100% on task during practice • 5: 80% exit ticket average Headphones on Friday!
100.Benjamins love it or hate it! hot seat ! hot seat ! music ! hot seat !
Objectives • Agenda • Catalyst 5 • Vision Refresh 5 • Circulatory Intro 15 • Heart Rate Lab 15 • Pathways Drafts 10 • We are learning about… • the circulatory system • We will be successful when we can… • explain how the circulatory system transports nutrients & oxygen to cells & removes cell waste arteries & veins
Heart iNtRo • Size of a fist… • Located slightly left of center in chest FiNdyOuRs! • Made of cardiac muscle • 3 main functions: • Delivers oxygen to cells • Delivers nutrients to cells • Removes waste from cells
Heart aNaToMy 4 chambers: • Right atrium • Right ventricle • Left atrium • Left ventricle 3 1 2 4
Heart PaThWaYs 1 What veins lead to this chamber? • Superior vena cava: blood from parts of the body above heart • Inferior venacava: blood from parts of the body below heart • Blood returning to heart & entering right atrium is loaded with carbon dioxide (CO2) • COLOR the veinsand the right atrium BLUE!
Heart PaThWaYs 2 Where does blood pass to enter this chamber? • Tricuspid valve: opens and closes to allow one - way blood flow • Ejects used blood through to the leftpulmonaryartery toward the lungs • Blood here is loaded with carbon dioxide (CO2) • COLOR the right ventricle & pathway to the lungs BLUE!
Heart PaThWaYs 3 Where does blood get oxygenated? • Receives oxygen-rich blood from the lungs via the leftpulmonary veins • Blood here is loaded with oxygen (O2) • COLOR the veins & left atrium RED!
Heart PaThWaYs 4 What does the bicuspid valve do? • Bicuspid valve: opens and closes to allow one - way blood flow • Largest chamber & strongest pump • Discharges blood into aorta through the aortic valve • From the aorta, all body tissues receive oxygen-rich (O2) blood • COLOR the left ventricle and aortaRED!
Heart sOuNdS “Lub Dub” • Tricuspid& bicuspid valves open and close simultaneously. • The closing of these two valves is the "Lub" sound heard through the stethoscope. • Pulmonary & aortic valves operate at the same time. • The "Dub" sound heard is the closing of these valves.
Quick Check! • What are the 3 main functions of the circulatory system? • Where does the heart pump oxygen-rich blood? • Where does the heart pump oxygen-poor blood? • How many chambers are there in the heart? • What is an UPPER chamber of the heart called? • What is a LOWER chamber of the heart called? A V
Heart Rate Lab 8 minutes! Question: When your body works hard during exercise, your cells need more oxygen and nutrients, and they make more carbon dioxide and other waste. How does your circulatory system respond to these changes? Hypothesis: I think that when my body works hard during exercise, my circulatory system responds by___________________________________ * Finding your carotid artery* • Use 2 fingers (index & middle finger) to find the “corner” of your jaw and move your fingers slightly down & forward. • Press lightly until you feel a pulse.
Pathways Journal 8 minutes! Imagine you are a red blood cell traveling through the circulatory system. Write a journal entry using bullet points to describe your journey through the heart& lungsusing the following vocabulary words: Make sure your journal entry includes the pathway through all 4 chambers of the heart. Circleall of the vocabulary words! • Heart • Atrium • Ventricle • Blood • Oxygen • Carbon Dioxide