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Blood Formation in Liver
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Script: By 6 weeks, blood cell formation is underway in the liver where lymphocytes are now present. This type of white blood cell is a key part of the developing immune system. The diaphragm, the primary muscle used in breathing, is largely formed by 6 weeks. | ||
| All ages referenced to fertilization, not last menstrual period. |
The Rapidly Growing Brain
Response to Touch
Blood Formation in Liver
Physiologic Herniation
Nipple Formation
Hand Movement
