SCI1186 Lecture Notes - Lecture 3: Swim Bladder, Homeostasis, Calcium Carbonate
16 Jun 2018
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Week 3 – Movement and Homeostasis
LOCOMOTION
All animals, including sessile animals move. They either move actively (using their own muscles) or passively (pushed by the
wind or water)
Animals move for many reasons:
• To find food
• Avoid predators
• Reproduction
• Changes in the environment (pH levels, salinity etc.)
• Disperse to an appropriate habitat
In order to move, an animal must exert a force on its surroundings
Flying: when flying, the air moving under the wings provides lift, while the smaller amount on the wings push the bird down.
The forms of wings depend on the need of the bird
Walking: legs provide the stability and ability to move. This movement occurs by lifting individual legs and moving
forwards. Walking becomes more complex with more legs
Cost: smaller animals typically require more energy to move, as they have a higher metabolic rate. Fish have low energy
needs as they have a swim bladder which allows them to float
Document Summary
They either move actively (using their own muscles) or passively (pushed by the wind or water) Animals move for many reasons: to find food, avoid predators, reproduction, changes in the environment (ph levels, salinity etc. , disperse to an appropriate habitat. In order to move, an animal must exert a force on its surroundings. Flying: when flying, the air moving under the wings provides lift, while the smaller amount on the wings push the bird down. The forms of wings depend on the need of the bird. Walking: legs provide the stability and ability to move. This movement occurs by lifting individual legs and moving forwards. Cost: smaller animals typically require more energy to move, as they have a higher metabolic rate. Fish have low energy needs as they have a swim bladder which allows them to float. 3 types: endoskeleton, found in all vertebrates. 3 types: endotherms: generates its own body temperature.
