Download - Unicellular and pluricellular living things
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LIVING BEINGS
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All living beings are made up of cells
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Life started long time ago...
Every single living being
evolved from simpler
structures of cells than
they are now.
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Unicellular living beings
Their bodies are made up of one cell,like virus and bacterium
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Cells organized in groups becoming into a new structure.
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What are CELLS?• Cells are the tiny building blocks of
living things.• All cells, whether plant or animal have
the same basic parts: cell membrane, cytoplasm, nucleus,nuclear membrane,vacuoles and mitochondria.
Each part performs a specific function.• A cell is able to reproduce by means
of splitting. Previously the nucleus doubles and divides in half so each new cell has a copy of the cell´s instructions
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ANIMAL CELL
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How do cells How do cells work?work?
• They use their parts to perform different jobs.
• Cell membrane separates it, gives the cell its shape and control what goes into and out of it.
• Cytoplasm is a jellylike liquid. It is inside the cell membrane.
• Vacuoles are tiny oval structures that store food, water or wastes. They are inside the cytoplasm.
• Mitochondria helps to change food into the necessary energy to do the cell work. It is inside the cytoplasm too.
• Nucleus contains the instructions for running the cell. It is surrounded by the nuclear membrane whose function is similar to cell membrane.
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PLANT CELL
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PLANT CELLS HOWEVER...
• ...have two additional parts that animal cells do not.
• Plant cells have cell walls around the cell membrane to support and protect the cell.
• Plant cells also contain chloroplasts with a green substance called chlorophyll.Chlorophyll traps energy from sunlight and enables the plant to make its own food.
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Cells form tissues
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CELLS ARE DIFFERENT
• Cells do not all look the same. Their shape depends on the job they do.
• A group of cells which carry out a specific task form a tissue.
• All tissues that make a common function form an organ.
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Tissues, organs and systems
There are several systems in the bodies of living beings that are organized and
specialized to do specific tasks .
All systems have to work at the same
time in a coordinated
process.