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Types of Animal Body Symmetry
Transcript of Types of Animal Body Symmetry
Three types of body symmetry
Red Tube Sponge
Underwater look at sponges that are asymmetrical
Animals with bilateral symmetry have a left and a right side. They also have a front end called ANTERIOR and a back end called POSTERIOR
Label your fish
Anterior & Posterior
Dorsal & Ventral
Concentration of sense organs and nerve cells at the anterior end. It allows animals to respond to their environment more quickly and better than simpler animals
An advantage of bilateral symmetry is ....
Do you see why they are called asymmetrical?
means NOT Symmetrical
NOT made up of exactly similar parts facing each other or around an axis; showing symmetry.
Symmetrical - made up of exactly
similar parts facing each other or
around an axis; showing symmetry.
Asymmetrical - NOT Symmetrical
Radial- Relating to, or arranged like rays. Radiating from or converging to a common center.
Bilateral- Having or formed of two sides; two-sided.
Does any part look like it is coming from the center?
Is it a round shape? Could you draw a radius or a diameter?
Can you divide this in half
and have equal parts?
A video explains the difference between Radially and Bilateral Symmetry
Radially symmetrical animals
How many times can you draw a plane through the center and get an equal part?
Click the back arrow if you don't remember!