Chondrichthyes have a two-chambered heart, some have electric organs or poison stings, and they are cold-blooded (poikilothermous).
Chondrichthyes have a two-chambered heart, some possess electric organs (Torpedo) or poison stings (Trygon), and they are cold-blooded (poikilothermous).
| Text | Heart of chondrichthyes is two-chambered (one auricle and one ventricle). Some of them have electric organs (e.g., Torpedo) and some possess poison sting (e.g., Trygon). They are cold-blooded (poikilothermous) animals, i.e., they lack the capacity to regulate their body temperature |
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