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Let us make
a very quick reflection on the science we studied concerning the human body. If you can recall, you learned that the human body is made up of
several systems. For example; the Muscular-Skeleton System in P.6, the digestive system in P.5, the circulatory system in P.6, the respiratory system in P.6, and the reproductive system in P.6.In this topic, we are going to look at the Muscular-Skeletal System.
Where in the body are these hard parts found? (Click on 'Activity' to write them down)
Exoskeleton: This is the kind of skeleton that forms the hard outside covering of an animal’s body. The hard covering is called the cuticle. The exoskeleton is found in all arthropods like;
The exoskeleton limits growth in these animals. For an animal to grow, it sheds the skeleton. This is called molting or ecdysis.
Endoskeleton: This is the type of skeleton that is found inside the body of an animal. It is made up of bones. The endoskeleton is found in all vertebrate animals. For example;
Hydrostatic skeleton: This is the type of skeleton that is possessed by animals whose bodies are filled with fluid. The fluid exerts pressure on the body of an animal and determines its shape and movement. This type of skeleton is found in creatures like;