2. The human body is an amazing machine
It's incredible how
all the body systems
work together
in unison and
precision

3. Concepts Cells, tissues, organs and systems. Human tissues. Systems.
The relationship between different systems.

4. Unit 1. The organization of the human body
1.- Levels of organization
2.- The chemical composition of living things
3.- Cells: the basic unit of living things
4.- Prokaryotic and Eukaryotic cells
5.- Cell organelles and structures
6.- Human tissue

5. Initial activity: This is a mess!! Organize the different levels:

8. Page 18
Question 1.
Atoms > Biomolecules > Organelles > Cells > Tissues > Organs > Organ systems >Organism

10. Assessment
xsbk/test

11. 2. The chemical composition of living things. Page 7

12. Organic molecules are unique to living things and contain significant amounts of the chemical element Carbon

13. Carbohydrates structure:

14. 2.- The chemical composition of living things:
Carbohydrates. Carbohidratos o hidratos de carbono:
Monosaccharides, monosacáridos Example: glucose, glucosa
Disaccharides, disacáridos Eg. Sucrose ,sacarosa and maltose, maltosa
Polysaccharides, polisacáridos Eg.Cellulose, celulosa and glycogen, glucógeno

15. Lipids, lípidos. Phospholipids, fosfolípidos
Cholesterol, colesterol
Lipids can be broken into:Fatty acids, ácidos grasos and Glycerol, glicerol
Proteins, proteínas, units( aminoacids, aminoácidos)
Proteins: E.g. Collagen, colágeno,Haemoglobin, hemoglobina, Antibodies,anticuerpos
Nucleic acids, ácidos nucleicos,
Units: nucleotides, nucleótidos
Examples of nucleic acids: DNA, RNA

17. 3.- Cells: the basic units of living things. Page 8

18. The Basics A cell is the smallest unit of all living beings.
They are the structrural and functional units for all thing things
How many cells are there in the human body?
1,800,000 to 2,400,000 dead skin cells fall off every hour, so billions fall off everyday.

19. The Basics: Size

20. Life functions in cells, Page 9
Nutrition: Processes in which cells obtain the matter and energy necessary to perform life functions. Nutrients inside the cell undergo chemical reactions ( metabolism). There are 2 types of metabolic reactions: Anabolism Catabolism

21. Anabolism. Metabolic reactions
in which simple molecules are joined together to form more complex ones,
which the cell then uses
to make up its components.
Energy is necessary in this reaction.

22. Catabolism. Metabolic reactions
in which more or less complex molecules are broken down and transformed into simpler ones, releasing energy.

23. Cellular respiration is………
An anabolic process
Why?
A catabolic process

24. Cellular respiration. A catabolic process which takes place in the mitochondria, in which
organic molecules such as glucose, in the presence of oxygen, are broken and
converted into Co2 and water, releasing a large amount of energy.

25. Photosynthesis is…..
An anabolic process
Why?
A catabolic reaction

26. Photosynthesis. An anabolic process which takes place in the chloroplasts, in which
energy from sunlight is used to convert inorganic molecules (CO2, water and mineral salts)
into organic molecules such as glucose.
Oxygen is also released during the process.

27. Page 18 Question 3