Body Fluids and Circulation
A small cut bleeds for a minute and then stops by itself. Behind that quiet event lie blood cells, plasma proteins and a chain of chemical steps. In this chapter you open up the blood, learn why a wrong transfusion is dangerous, and follow the lymph that drains the tissues. Then you go inside the heart, trace the two loops of the circulation, read the heart beat from a cardiac cycle and an ECG, and meet the common disorders. Python counts cells, checks transfusions and reads heart rates.
Part of Biology · High School (11–12) (chapter 13)
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Blood, Blood Groups, Coagulation and Lymph
What blood is made of and what each kind of cell does. Why the blood group matters in a transfusion, and what the Rh factor means for a baby. How a clot forms, and how the lymph returns tissue fluid to the blood.
The Heart and the Circulatory Pathways
How animals move their blood: open and closed circulation, and the hearts of fish, frogs and mammals. The chambers, valves and nodal tissue of the human heart, and the two loops of the double circulation.