why human beings are complex organisms
DESCRIPTION
science form 1TRANSCRIPT
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WHY HUMAN BEINGS ARE COMPLEX ORGANISMS1 Lycos
Deborah Kwek
Thum Jie En
Jessie Gan
Sharifah Nadia
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CONTENTS
1) Human cells
2) Tissues
3) Organs
4) System
5) Organism
6) Conclusions
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CELL ORGANISATION
• CELL: THE SMALLEST UNIT OF LIFE IN OUR BODY
• TISSUE: MADE UP OF A GROUP OF CELLS
• ORGAN: MADE UP FROM A FEW DIFFERENT TYPES OF TISSUES
• SYSTEM: MADE UP OF A FEW ORGANS
• ORGANISM: MADE UP OF DIFFERENT SYSTEMS THAT ARE COORDINATED TO CARRY OUT VARIOUS FUNCTIONS
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TYPES OF SIMPLE CELLS IN HUMAN BODY
• Epithelial cells
• Nerve cells
• Sperms
• Ovum
• Red blood cells
• Muscle cells
• White blood cells
• Bone cells
• Cardiac cells
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TYPES OF CELLS
Epithelial cells: To cover our body against diseases
Nerve cells: Conduct nerve impulses throughout the body
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Sperm cells
Ovum
Reproductive cells: To unite and form a baby
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Red blood cells: To carry oxygen to other parts of the body
Muscle cells: To allow movement by contracting
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White blood cells: To kill bacteria
Bone cells: To support our body
Cardiac cells: To pump blood
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TISSUES
Made up of the same type of cells that work together to perform a function.
Muscle Tissue
Contracts and causes body movement.
Epithelial Tissue
Covers the body and lines all organs
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Bone Tissue
It protects and supports our body
Nerve Tissue
To send messages to our brain
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ORGANS
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SYSTEM
Digestive System
CirculatorySystem
SkeletalSystem
RespiratorySystem
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ORGANISMS
Cell Tissue Organ System Organisms
• All systems in the body work together to make up a multicellular organism.• These systems do not work independently but work with one another so that the organism functions as a whole.• The organisation of cells can also be represented in the form of a ladder of hierarchy from the very simple to the more complex.
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CONCLUSIONS
• Human beings have various types of cells which are specialised to perform specific function which is known as division of labour.
• Division of labour among cells, tissues, organs and systems ensures that the organism functions efficiently.
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THE END