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Vertebrates | Invertebrates 1. Circulatory System i. In all vertebrates, (& few invertebrates), have a Closed Circulatory Systems In a closed circulatory system, blood is contained inside blood vessels and circulates unidirectionally from the heart around the systemic circulatory route, then returns to the heart again. have an open circulatory system, in an open circulatory system, the blood is not enclosed in the blood vessels but is pumped into a cavity called a hemocoel and is called hemolymph because the blood mixes with the interstitial fluid.

          Vertebrates | Invertebrates
1. Circulatory System
i. In all vertebrates, (& few invertebrates), have a Closed Circulatory Systems
In a closed circulatory system, blood is contained inside blood vessels and circulates unidirectionally from the heart around the systemic circulatory route, then returns to the heart again.
have an open circulatory system, in an open circulatory system, the blood is not enclosed in the blood vessels but is pumped into a cavity called a hemocoel and is called hemolymph because the blood mixes with the interstitial fluid.

Vertebrates | Invertebrates
1. Circulatory System
i. In all vertebrates, ( few invertebrates), have a Closed Circulatory Systems
In a closed circulatory system, blood is contained inside blood vessels and circulates unidirectionally from the heart around the systemic circulatory route, then returns to the heart again.
have an open circulatory system, in an open circulatory system, the blood is not enclosed in the blood vessels but is pumped into a cavity called a hemocoel and is called hemolymph because the blood mixes with the interstitial fluid.

Added by Shannon U.

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