BLOOD AND THE HEART

1.RED BLOOD CELLS

What are they and what do they do?

RED BLOOD CELLS

○ Made in bone marrow○ Lack a nucleus○ Have haemoglobin○ take oxygen from the lungs○ deliver oxygen to cells

2.WHITE BLOOD CELLS

What are they and what do they do?

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

3.PLATELETS

What are they and what do they do?

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

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?

4.SECTIONS OF THE HEART

What are they and where do they lead?

RIGHT ATRIUM

RIGHT VENTRICLE

LEFT VENTRICLE

LEFT ATRIUM

5.JOB OF THE HEART

What does it do for the body?

NOTICE THE ARROWS?This is the direction that blood flows into and out of the heart.

6.WHERE THE CIRCULATORY SYSTEM FITS

EVERYWHERE