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Fluid and nutrients circulation of organisms

1.	An introduction to transportation in animals. Human circulatory system
2.	The components and functions of blood
3.	Blood vessels of the circulatory system
4.	Human heart and heart beat
5.	Excretion in animals. Human excretory system
6.	Sweat, dialysis and excretory products of other animals
7.	Transport system of plants

1.	Human circulatory system and blood Difficulty: easy	3
2.	Blood vessels Difficulty: easy	2
3.	Arteries and veins Difficulty: easy	2
4.	Excretion in animals Difficulty: easy	3
5.	Transportation in plants Difficulty: easy	3
6.	The process of excretion in animals Difficulty: medium	4
7.	Blood, blood vessels and heart Difficulty: medium	5
8.	Heart and excretory system of humans Difficulty: medium	4
9.	The transport system of animals Difficulty: medium	3
10.	Circulation of blood in humans Difficulty: medium	4
11.	The transport system of humans and plants Difficulty: medium	4
12.	The circulatory and excretory system of humans Difficulty: hard	6
13.	Circulatory system of humans Difficulty: hard	6

1.	Training test 1 Difficulty: easy	10
2.	Traning test 2 Difficulty: easy	10
3.	Training test 3 Difficulty: medium	9

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Methodical recommendation

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