Think of the Entries metric as a subset of the Visits metric. Many pages may be associated with a single visit, but only one page is the first page viewed (i.e. the entry). When applying Visits or Entries to a dimension, such as Page Name, you should always see Visits >= Entries.
Every page viewed during a visit will get credit as a "Visit" for that visit. Only the first page viewed will get credit as an "Entry" for that visit, as that metric reflects the entry point (ie// first page viewed).
Consider, if a visitor views just the following five pages during a single visit:
1. Paid Search Landing Page (Entry page)
2. Product Detail Page
3. Cart Page
4. Checkout Page
5. Order Confirmation Page
The report would show 1 Entry for "Paid Search Landing Page", and all five pages would show 1 Visit. ("Order Confirmation Page" would also get 1 Exit, as this was the last page encountered.)