Download Unicellular Organisms

Unicellular and Multicellular Organisms
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Unicellular Organisms …………………………..
A single-celled organisms is also known as a unicellular organisms.
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A single cell can be a complete organisms and performs the
necessary functions to keep it alive.
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Example of unicellular organisms are Euglena, Paramecium Amoeba
Yeast and Diatom.
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Euglena
Paramecium
Yeast
Amoeba
Diatom
Multicellular Organisms…………………………..
Living things that are made up of more than one cell are celled
multicellular Organisms.
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Bodies of large plants and animals consist of millions of different
types of cell.
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There are different types of cells in various shapes and sizes in a
multicellular organisms.
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Examples of multicellular organisms are Hydra, Mucor, Spyrogira,
Plants, Animals and Human.
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Hydra
Animals
Mucor
Spyrogira
Plants
Human
Call Organisation in the Human Body
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Call Organisation…………………………..
The cells are arranges sequentially from simple to complex.
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The cell organisation in the human body is as follows :
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Cell
Tissue
Organism/Human
Organ
System
Specialised Cells…………………………..
There are billions of cells in the human body.
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Different cells are specialized to perform specific functions.
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Nerve cells
Carry massage from various
part of the body to the brain
back to the muscle cells.
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Bone cells
From bones. Support the
body.
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Red blood cells
Carry oxygen around the
body.
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Muscle cells
Enable movement.
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Fat cells
Store fat.
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From Cells to Tissues…………………………..
Cells of the same type with specialised function are group together to
from tissues.
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Every cell in a tissues are able to carry out more work at a faster rate.
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Nerve tissue
Found in the brain and the
spinal cord. Carries
messages from one part of
the body to another.
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Muscle tissue
Found in the limb (arms and
legs) and in the walls of
same organ. Contracts and
causes body movement.
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Connective tissue
Includes bone, fat and
cartilage. Used to join parts
of organism.
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Epithelial tissue
Found on the surface of the
skin, on the outer covering
of tubes and lines the spaces
inside the body. Protects
structure underneath the
surface.
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From Tissues to Organs …………………………..
A number of different types of tissues in human body are group
together to form an organ.
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An organ is a specialised structure which is responsible in carrying
out certain bodily function.
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Brain
Consists of connective
tissue and nerve tissue.
Controls the various part of
the body.
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Heart
Consists of muscle tissue
and connective tissue.
Pumps blood around the
body.
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Stomach
Consists of epithelial,
muscle tissue and
connective tissue. Digest
(breaks down) food.
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