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Published byRonald Hunter Modified over 8 years ago
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Aim: How does the human circulatory system function to maintain body homeostasis? DO NOW Directions: State whether the following quotes are true or false & explain why. 1.“The heart pumps oxygen to the brain” 2.“Oxygen diffuses into and out of the heart”
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Circulatory System Includes: blood, blood vessels & heart Function: to transport dissolved material (glucose, oxygen, amino acids) to all parts of the body & carry and take away wastes & carbon dioxide
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Blood Liquid medium inside our body Transports nutrients, gases, hormones, antibodies Regulates temperature Consists of: red blood cells, white blood cells, platelets, plasma
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Red Blood Cells Transport oxygen & carbon dioxide On surface: hemoglobin protein Concave shape
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White Blood Cells Fight disease in the body (defenders) Make antibodies Many different types
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Platelets Involved in blood clotting helps healing
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Plasma Liquid part of the blood Clear, straw- colored liquid Largest component of blood
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Blood Vessels Three types Arteries: carry oxygenated or oxygen-rich blood away from the heart – Have thick walls – Transport blood at high pressure – Pulse rate can be calculated from artery Veins: carry deoxygenated or oxygen-poor blood toward the heart – Thinner walls – Transport blood at low pressure Capillaries: smallest & connect arteries & veins – Diffusion of oxygen & carbon dioxide occurs here
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Blood Vessels Visual
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Heart 4 chambers 2 Upper chambers: atria (plural) 2 Lower chambers: ventricles 2 sides: left & right Right side carries oxygen-poor blood – Blood from this side will go to LUNGS to pick up oxygen Left side carries oxygen-rich blood – Blood from this side will go to BODY
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Heart Image
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Gas Exchange LUNGS: where gas exchange happens Diffusion occurs between capillaries & blood Oxygen enters blood & gets transported back to heart Carbon dioxide will leave blood & be exhaled out of the body
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Blood Circulation
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AORTA Largest artery in the body transports oxygen rich blood to BODY
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Video http://studyjams.scholastic.com/studyjams/ja ms/science/human-body/circulatory- system.htm http://studyjams.scholastic.com/studyjams/ja ms/science/human-body/circulatory- system.htm https://www.brainpop.com/health/bodysyste ms/circulatorysystem/ https://www.brainpop.com/health/bodysyste ms/circulatorysystem/
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Video Quiz http://studyjams.scholastic.com/studyjams/ja ms/science/human-body/circulatory- system.htm http://studyjams.scholastic.com/studyjams/ja ms/science/human-body/circulatory- system.htm
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School-House Rock –Circulation Song https://www.youtube.com/watch?v=5tTkxYeN F9Q https://www.youtube.com/watch?v=5tTkxYeN F9Q
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Group Activity Directions: In pairs, answer the following questions. 1.What other major body system does the circulatory system work with & how do they work together? 2.How does the human circulatory system maintain body homeostasis?
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Individual Activity Directions: Answer the following question & submit! Q: The general pathway of blood in the body is A. heart lungs body heart B. body lungs heart body C. lungs heart lungs body D. heart lungs heart body
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Homework Read txt. pgs. 582-589 Answer questions 1,3 & 5 on pg. 589
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