[j-nsp] ScreenOS question

[SunnyDay]

Hello a stupid question maybe.

When i ping to a host i can see from the logging of the firewall this:
192.168.40.10:24064 	192.168.100.11:512 	192.168.40.10:24064 
192.168.100.11:512 	ICMP


my question is this i thing that icmp does not have a port,why do i get 
a dst-port from this output?
how does this work?
and second i tried to ping from a certain device  and in the logging the 
dst-port was 0.
Is there a problem with that?

Any help appreciated.