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If all of the muscle fibers in the neck, trunk, and legs were to totally relax, the body would collapse. What is the state called where some of the fibers in a particular muscle are always contracted?
Gelatinous Covering
A thick, jelly-like substance that coats or surrounds certain cells or organisms, often serving protective or structural functions.
Internal Fertilization
A reproductive process in animals where sperm fertilizes an egg inside the body.
Homo Erectus
An extinct species of early human that lived throughout most of the Pleistocene geological epoch, known for being one of the first hominids to have a stature and proportions similar to those of modern humans.
Homo Sapiens
The species name for modern humans, characterized by bipedalism and advanced cognitive abilities.
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