BRAINCAKEOpen Circulatory Systems
In open circulatory systems the transport medium is pumped from the heart and into an open body cavity called the haemocoel.
The transport medium is under low pressure in the haemocoel where it bathes the tissues and organs.
Substances are exchanged between the cells and transport medium by diffusion.
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Key terms in this lesson
- diffusion
- The net movement of molecules or ions from a region of higher concentration to a region of lower concentration, down a concentration gradient.
More in Transport in Animals
- Specialised Transport Systems
- Features of a Transport System
- Types of Circulatory System
- Closed Circulatory Systems
- Single Closed Circulatory Systems
- Double Closed Circulatory Systems
- Blood Vessels
- Arteries
All 22 lessons in Transport in Animals · All OCR AS-level Biology topics