Eukaryotic and prokaryotic cells
Unicellular and multicellular organisms
• All the living beings are composed of cells.
• Cells are the smallest units that exist.
• They can perform the three basic funtions of life:
Nutrition, relation and reproduction.
• In the nucleus of each cell is the DNA contains all the
genetic information of each living being.
• Eukaryotic cells have got nucleus.
• More complex than prokaryotic cells and they
have got a nucleus bounded by a wrap.
• Examples: seaweeds, fungi, animals and
• Two kinds: animal cells and plant cells.
Bounded= delimitado Wrap=envoltura Seaweeds=algas
• Plant cells have a cell wall that covers the cell
giving protection and strength.
• They are the only cells with chloroplasts.
• Chloroplasts serve to perform photosynthesis.
• Seaweeds and plants have plant cells.
The differences between animal cell
and plant cell:
• Plants cell has got cell wall and chloroplasts that
animal cell doesn´t have.
• The animal cell has got centrosomes and plant
cell hasn´t got them.
• Vacuoles are more abundant in animal cells but
in the plant cells are larger.
Unicellular organisms are formed by a single
Most of unicellular organisms are prokaryotes,
Organisms of the kingdoms Monera, Fungi and
Protoctista are unicellular.
They are formed by two or more cells.
The cells of the multicellular organisms can´t live
independently, they need the other cells to live.
• Epithelial tissue: it is a tissue formed by one or
several layers of cells. This tissue covers every body
• Connective tissue: it joins organs and tissues.
• Cartilage tissue: it forms structures.
• Muscle tissue: it makes contractions and extensions.
Its function is to allow the movement.
• Nerve tissue: it captures stimuli and it gives answers.
Several layers=varias capas Allow=permitir Stimuli=estímulos