Why are there WSA pendants for socket(), connect(), send() and so on, but not for closesocket()?

I'm going to try to explain what I mean using a few examples:

• socket() -> WSASocket()
• connect() -> WSAConnect()
• send() -> WSASend()
• sendto() -> WSASendTo()
• recv() -> WSARecv()
• recvfrom() -> WSARecvFrom()
• ...
• closesocket() -> WSA???()

This is nothing that matters much, but is still something that gives me a splitting headache.