Cell (Latin; little room) is the basic building block of all living organism.
Go to this video.
Go to this video.
We can observe cells (e.g; of an onion peel) with compound microscope. With electron microscope, it is possible to observe and understand the complex structure of the cell and its various organelles.
Have you ever participated in amoeba race! or went for bowling in Amoeba bowling alley!
Some living organisms are made up of one cell only, these are called unicellular. Amoeba is a unicellular organisms. There are other unicellular organisms too for example Bacteria, Paramecium or Chlamydomonas. Amoebas are found in ponds and ditches. Amoeba feed on smaller organisms such as bacteria. Useful substances that the amoeba requires like Oxygen pass into to the amoeba from the water around by diffusion and waste substances such as carbon dioxide pass out into the water also via diffusion.
Multicellular organisms are those which are made up of many cells. Humans are multicellular. Multicellular organisms can be much larger and more complex. This is because the cells of the organism have specialised into many different types of cells such as nerve cells, blood cells, muscle cells all performing different functions.
Some living organisms are made up of one cell only, these are called unicellular. Amoeba is a unicellular organisms. There are other unicellular organisms too for example Bacteria, Paramecium or Chlamydomonas. Amoebas are found in ponds and ditches. Amoeba feed on smaller organisms such as bacteria. Useful substances that the amoeba requires like Oxygen pass into to the amoeba from the water around by diffusion and waste substances such as carbon dioxide pass out into the water also via diffusion.
Multicellular organisms are those which are made up of many cells. Humans are multicellular. Multicellular organisms can be much larger and more complex. This is because the cells of the organism have specialised into many different types of cells such as nerve cells, blood cells, muscle cells all performing different functions.
Cell organelles;
- ER (Endoplasmic Reticulum)
- Golgi Apparatus
- Lysosomes
- Mitochondria
- Plastids
- Vacuoles
Prokaryotic Cell/ Eukaryotic Cells:
A Eukaryote is any organism whose cells contain a nucleus and other organelles enclosed within membranes.
Who created all this trouble for you;
Robert Hooke: He discovered the cells of a cork slice with the help of primitive microscope.
Robert Brown: Brown discovered the nucleus in the cell.
A Eukaryote is any organism whose cells contain a nucleus and other organelles enclosed within membranes.
Who created all this trouble for you;
Robert Hooke: He discovered the cells of a cork slice with the help of primitive microscope.
Robert Brown: Brown discovered the nucleus in the cell.
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