Examlex
The atomic mass number of an atom is equivalent to the number of ________.
Ligaments
Bands of tough, elastic connective tissue that connect bones together and provide support to joints.
Spiracle
An external respiratory opening in some animals, particularly insects, spiders, and some fish.
Carbon Dioxide
A colorless, odorless gas produced by burning carbon and organic compounds and by respiration, often considered a greenhouse gas contributing to global warming.
Bicarbonate Ions
Chemical ions (HCO3-) that act as a buffering agent in blood, maintaining pH balance by neutralizing acids.
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