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Title: Cells
Description: * My Teacher's Notes * For year 10 studnets but also for any year
Description: * My Teacher's Notes * For year 10 studnets but also for any year
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Cells
Thursday, 23 July 2 015
11:28 am
• All living things including humans as made of cells
• We are multicellular organisms made up of trillions of cells
• Multi-‐cellular organism are made up of different types of cells
...
Different Types of Cells
The diagrams above show muscle cells, nerve cells and blood cells
General Cell Structure
Even though we have specialised cells in our body they all made up of much
General Cell Structure
Even though we have specialised cells in our body they all made up of much
the same parts
...
Nucleus Confusion
Before we go any further let's clarify something
...
Nucleus Confusion
Before we go any further let's clarify something
...
The word nucleus means "central" hence the same word in used to describe
both centres of atoms and the centres of cells
...
Inside the nucleus
• If we took inside the nucleus of a cell we find the genetic blueprint of
the organism
...
• All human cells have 23 pairs of chromosomes, so 48 in total
...
For Example:
• Chimpanzees -‐ 48 chromosomes
• Shrimp -‐ 254 chromosomes
• Rice -‐ 24 chromosomes
Chromosomes
Chromosomes
• One pair of the 23 are know as the Sex Chromosomes and contain
information of the sexual characteristics
...
• The other 22 pairs of chromosomes are called autosomes
...
• 23 of your chromosomes are from your mother the other 23 are form your
dad
...
This is called
Male (XY) or Female (XX)
• In males one of the sec chromosomes in shorter that the other
...
• Females have two x chromosomes
...
Called "XX" while males are "XY"
...
• This DNA is tightly wound in a coil to make the chromosome
...
Title: Cells
Description: * My Teacher's Notes * For year 10 studnets but also for any year
Description: * My Teacher's Notes * For year 10 studnets but also for any year