BRAINCAKEClosed Circulatory Systems
In a closed circulatory system, blood is the transport medium and is confined in blood vessels and does not come directly in contact with tissues and cells.
The heart pumps blood under high pressure throughout the body and blood returns directly to the heart.
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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
- Open 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