What Is Muscle?
What Is Muscle? Muscle is the body tissue which, because it has the power of contraction, enables the higher animals to move their bodies. M
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Skeleton
What Is the Purpose of Bones in Human Body?
What Is the Purpose of Bones in Human Body? We have bones to give us shape and support the body, to protect and contain the body’s delicat
How Does a Clam Make Its Shell?
If you have ever examined a clam shell, you may have wondered how the shell got bigger as the clam grew. A clam is born with a shell just th
What Is a Sand Dollar?
What Is a Sand Dollar? Have you ever taken a walk along the beach to collect seashells and found a gray disk shaped like a silver dollar? If
What Is a Sponge?
A sponge is an extremely simple kind of water animal with a soft, elastic skeleton. It has no head, mouth, or brain. Sponges hatch from eggs