Development Animation - Heart Looping

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• Heart Looping Movie

File:Heart1_looping_icon.jpg</wikiflv>

Cardiac Looping Cardiac looping occurs in humans from late in the fourth week to early in the fifth week. The heart tube is initially straight in an almost rostro-caudal (head-tail) direction) virtually fixed at the upper and lower ends. As the heart tube is grows and elongates it begins to fold or "loop" inside the pericardial cavity. Links: Quicktime | Quicktime version | Flash version | Tutorial - Cardiac Looping | Cardiovascular System Development