Open vs. ClosedCirculatory System

Advanced Biology 11Ms. Lowrie

Open Circulatory System

Have heart May have some blood vessels

Not always connectedBlood carrying oxygen/

nutrients pumped into body cavities Surrounds cells

Open Circulatory System

Examples:SnailsGrasshoppersLobsters Insects

Closed Circulatory System

Have blood vesselsBlood always in heart or vesselsLarger vessels

branch into smaller vessels

Blood supplied to all body tissues

Closed Circulatory System

Examples:EarthwormsFishHumansMonkeys

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#1-3 , 5 pg 243