TwoOldGuys Study Guides
Although the stem cells could be considered a tissue, they
are treated separately due to their importance to animal growth and development.
[Animal] stem cells are analogous to [plant] meristem cells.
Stem cells retain the ability to divide throughout the life of the animal.
The daughter cells from meristem may remain meristematic, or may
differentiate to other tissues.
The ultimate stem cell is the zygote.
- skeletal support
- exoskeleton (invertebrate)
- endoskeleton (vertebrate)
- body cavity
- tissues are groups of contiguous cells
- differentiated to provide the same function
- pseudostratified columnar
- cell [neuron]: dendrite→body→axon
- reflex arc
- sensory neuron
- synapse & neurotransmitters
Tissues (usually several types) are assembled into larger [macroscopic] structures
each of which provides a function(s) at the whole animal level.
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revised 19 aug 2006