The human body is an amazing machine

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Presentation transcript:

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

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

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

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

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

Assessment http://www.bbc.co.uk/education/guides/zgc xsbk/test

2. The chemical composition of living things. Page 7

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

Carbohydrates structure:

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

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

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

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.

The Basics: Size

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

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.

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

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

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.

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

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.

Page 18 Question 3