Which system has the main function of the body’s defense?
2 answers:
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- Nucleus :
- It is responsible for controlling all the cellular activities.
- It carries all the genetic information for growth , development , metabolism , reproduction and behaviours.
- It regulates protein synthesis.
- It includes genetic changes and brings variation which is essential for organic evolution.
- Mitochondria [ power house of cell ]
- They help in synthesis of fatty acid and amino acid.
- They also regulate calcium ion concentration inside the cell.
- They are the site of thermogenesis [ heat generation ]
- Endoplasmic reticulum
- It acts as a cytoskeleton and gives mechanical support.
- It helps in lipid synthesis.
- It helps in glycogenolysis.
- It forms nuclear envelope during cell division.
- Ribosomes
- They help in synthesis of protein and hence they are called protein factories.
- They also store protein for a temporary time.
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