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BASIC TISSUES - CELLS (Levels of organisaton (Tissues - clusters of cells…
BASIC TISSUES - CELLS
Levels of organisaton
Tissues - clusters of cells of similar structure performing similar function
Organs - made of at least 2 primary tissues that preform 1 specific function
Cells - basic unit of life
Organ systems - group of organs performing a specific purpose (11)
What is a cell?
Basic building block
Smallest unit of living matter
Structural and functional unit of all living organisms
Classification
Prokaryotes
Simple internal structure and more primitive
No nuclear membrane (bacteria)
No membrane bound organelles
Eukaryotes
Nuclear membrane surrounding genetic material
Numerous membrane bound oraganelles
Complex internal structure
How big is a cell?
Prokaryote 1 - 10 μm
Eukaryote 10 - 100 μm