| 1. | The retraction and contraction of the cardiac stomach is activated by a neuropeptide known as NGFFYamide.
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| 2. | In more advanced species of starfish, the cardiac stomach can be everted from the organism's body to engulf and digest food.
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| 3. | In starfish, the female may carry the eggs in special pouches, under her arms, under her arched body or even in her cardiac stomach.
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| 4. | Primitive starfish, such as " Astropecten " and " Luidia ", swallow their prey whole and start to digest it in their cardiac stomachs.
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| 5. | Primitive starfish, such as " Astropecten " and " Luidia ", swallow their prey whole, and start to digest it in their cardiac stomachs.
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