Download - Week 1 blood and heart
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BLOOD AND THE HEART
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1.RED BLOOD CELLS
What are they and what do they do?
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RED BLOOD CELLS
○ Made in bone marrow○ Lack a nucleus○ Have haemoglobin○ take oxygen from the lungs○ deliver oxygen to cells
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2.WHITE BLOOD CELLS
What are they and what do they do?
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WHITE BLOOD CELLS
○ Made in bone marrow○ Make up our immune system○ Seek and destroy foreign bodies
(virus, “bad” bacteria, parasites)○ Are bigger than red blood cells○ Are different types to perform
different jobs
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3.PLATELETS
What are they and what do they do?
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PLATELETS
○ Made in bone marrow○ Involved in injury○ Plug, clot, and assist in repair of
damaged blood vessels○ Send chemical signals to attract more
platelets
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WHAT TO DO NOW AnswerChapter 4.5
Understanding and Inquiring Questions 2 and 4
DrawA cartoon of a red blood cell, white blood cell, and platelet with a speech bubble telling their main job.
Think and DiscussWhat would happen if your red blood cells could not carry enough oxygen around the body?
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4.SECTIONS OF THE HEART
What are they and where do they lead?
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RIGHT ATRIUM
RIGHT VENTRICLE
LEFT VENTRICLE
LEFT ATRIUM
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5.JOB OF THE HEART
What does it do for the body?
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NOTICE THE ARROWS?This is the direction that blood flows into and out of the heart.
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6.WHERE THE CIRCULATORY SYSTEM FITS
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EVERYWHERE