ORGANISATION OF HUMAN BODY 1º

THE ORGANISATION OF THE HUMAN BODY

EMPEZAR

Levels of organisation of living beings:

Levels of organisation of human beings:

Characteristics of living beings:

• We are made of chemical substances knowns as biomolecules.
• We are made of eukaryotic cells
• We are heterotrophic organisms
• We perform the three vital functions
• We are multicellular organisms

Characteristics of living beings:

Different types of cells:

Most are MULTICELLULAR; some Fungus and some Protist (algae and protozoa) are UNICELLULAR)

All of us are UNICELULLAR

(in general: protists, fungus, plants and animals)

(plants, algae and fungus)

• Human cells are eukariotic and heterotrophic (they feed on organic material).
• Cells are structural and functional units of our bodies.
• All cells have a basic structure with the following parts: membrane, cytoplasm and nucleus.

Remember:

Structures in human cells:

SCIENCE Lab: SAFETY rules

Lab tools and equipment:

10

The three vital functions of living things:

Activity 24 page 39

INTERACTION

REPRODUCTION

NUTRITION

Taxonomy and nomenclature:

Taxonomy is the science of classifying living things according to natural criteria (functional or anatomic). It classifies living things into groups of organisms that have shared characteristics. Each group or taxon is assigned to a taxonomic category.

Carl Linneus

To name species we use the sytem of binomial nomenclature, invented by Linneus in 1753. Each species has a name with two Latin words written in italics; the first word is the genus and the second describes a specific characteristics of the species. Quercus ilex

Ex. 36 pág 42

The kingdoms:

Eukarya domain

Archaea domain

Bacteria domain

Biodiversity:

All living things come from the first cell that exist. This cell is the base os the "tree of life". The branches of the tree are made up of the descendants of that original single cell. They reproduced and multiplied as they changed over millions of years. Those changes allowed some individuals to adapt better to their environment and to survive and reproduce. This process is called biological evolution

The tree of life:

Do you think is biodiversity important for us?

LUCA

KEY POINTS OF THE CELL THEORY:

• All living things are made of cells.
• All cells can from the division of other pre-existing cells.
• Cells are the basic unit of live