WHAT ARE CELLS LIKE?
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WHAT ARE CELLS LIKE?
Cells, those basic units from which all living-beings are made up. Cells are grouped together in tissues. Cells: Their composition, quantity, size, characteristics,... Cellular functions: chromosomes forming DNA chains. The composition of viruses. Composition of cells: nucleus, cytoplasm, membrane. Differences between animal and plant cells. Cellular reproduction. Mitosis, meiosis. Summary.
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INTRODUCTION
- Definition of Cells.
- Electronic microscopes
- Practically all existing organisms are either cells themselves or are made up of cells in variable quantities.
- The human-being: Different kinds of cells, functions, shapes and size.
CELLULAR FUNCTION
- Cells: Have chromosomes linked together in a determined way making up the DNA chains.
- Viruses. Bacteria.
- The cells of plants and animals.
- Nucleus of the cells.: Necessary genetic information for the correct functioning of cellular processes.
- Proteins: Endoplasmatic reticule. Ribosomes.
- The Apparatus of Golgi.
- Lysosomes and mitochondrions.
- External and internal stimuli.
- Forms of movement
CELLULAR REPRODUCTION
- The DNA. All cells of all the individuals making up a particular species have the same number of chromosomes, with the exception of the cells realted to determining sexuality.
- Mitosis and meiosis.
SUMMARY |
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