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To restart a heart,rescuers use
Keystone Species
A species that has a disproportionately large effect on its ecosystem, influencing the types and numbers of other species in a community.
Sea Stars
Sea stars, also known as starfish, are marine invertebrates belonging to the class Asteroidea, known for their radial symmetry and a body plan consisting of a central disc from which arms (or rays) extend.
Intertidal Zone
The area of the shoreline that is exposed to the air at low tide and submerged under water at high tide, home to diverse organisms.
Mussels
Aquatic mollusks with a bivalve shell, widely consumed as seafood, and known for their role in aquatic ecosystems as filter feeders.
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