Describe the progressive evolution of mammals from their synapsid ancestors.

The evolution of mammals from their synapsid ancestors represents a fascinating journey marked by gradual morphological, physiological, and ecological adaptations over millions of years. Synapsids, a group of amniotes characterized by a single temporal fenestra in their skull, emerged during the Late Carboniferous period (approximately 310 million years ago). These early synapsids are not true mammals but are often referred to as "mammal-like reptiles" due to their intermediate characteristics.

### Early Synapsids
The basal synapsids, such as pelycosaurs, were primarily reptilian in form. They exhibited sprawling postures, simple teeth, and relatively primitive metabolisms. Their temporal fenestra allowed for the attachment of larger jaw muscles, an adaptation that likely improved their feeding efficiency. Over time, more advanced synapsids, known as therapsids, emerged in the Permian period. Therapsids exhibited more mammalian traits, ____ ___ _____ _______ __________ _____.
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