What do I call the "two ends" of the link?

<ul>
<li><a href="http://www.youtube.com/watch?v=ZXOAc5yt218">"Suck" and "blow"</a>?
<li><a href="http://en.wikipedia.org/wiki/Anatomical_terms_of_location">"Distal" and "proxmial"</a>?
<li>"Friend" and "foe"?
<li><a href="http://en.wikipedia.org/wiki/Ingroup">"Ingroup"</a> and <a href="http://en.wikipedia.org/wiki/Outgroup_%28sociology%29">"outgroup"</a>?
</ul>