Transcript ch7iv-Use This 3rd

IV. The Diversity of Cellular Life
A. Unicellular Organisms
--Single-celled Organisms that do
all a living thing would
----They dominate life on earth in
terms of numbers
B. Multicellular organisms
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Multicellular organisms
–
Made up of many cells
–
Depend on communication and cooperation between
specialized cells
---_______________-cells throughout organism can develop in
different ways to perform different tasks
Cell specialization
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1. Specialized animal cells
– eg. Red blood cells equipped to carry oxygen
;cells specialized to produce proteins produced
in pancreas(have many ribosomes and rough
ER);muscle cells have actin and myosin
cytoskeleton elements for contraction
2. Specialized Plant cells
______________________-are tiny openings on
underside of leaves and exchange gases
_____________________-regulate gaseous
exchanges in stomata,changing shape due to
plant’s internal conditions
•
stomata
Guard cells
C. Levels of Organization
– 1. individual cells
– 2. _____________________-group of similar cells w/
particular function
– 3. ______________-group of tissues working
together
– 4. ______________-group of organs working
together for particular function
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tissue
organ
Organ system
Levels of Organization
Section 7- 4
Muscle cell
Go to
Section:
Smooth muscle tissue
Stomach
Digestive system