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In valence bond theory,each sigma bond in CH4 is formed from the overlap of a hydrogen atom's 1s orbital with a(n)________ hybridized orbital on the carbon atom.
Open Circulatory System
System in which hemolymph leaves vessels and seeps among tissues before returning to the heart.
Hemolymph
A fluid equivalent to blood in most invertebrates, occupying the hemocoel and involved in transporting nutrients, wastes, and hormones.
Cardiac Muscle Cells
Specialized muscle cells found in the heart that contract to pump blood throughout the body, characterized by their striated appearance and intercalated discs.
Gap Junctions
Specialized intercellular connections that allow for direct communication between the cytoplasm of two cells, enabling the transfer of ions and molecules.
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