Wireshark http request

Hi I have this connection that gave me this file below:

GET /~rcp000/aula-3-http.html HTTP/1.1
Host: luna-ext.di.fc.ul.pt
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Cookie: __utma=161469610.851465279.1451934880.1454512910.1454584250.23; __utmz=161469610.1454584250.23.10.utmcsr=id.fc.ul.pt|utmccn=(referral)|utmcmd=referral|utmcct=/cas/login; __utmc=161469610
Connection: keep-alive

HTTP/1.1 200 OK
Date: Tue, 29 Mar 2016 16:48:49 GMT
Server: Apache/2.2.3 (Red Hat)
Last-Modified: Tue, 23 Feb 2016 12:29:44 GMT
ETag: "3ca04a9-1631-1aab9e00"
Accept-Ranges: bytes
Content-Type: text/html; charset=UTF-8
Vary: Accept-Encoding
Content-Encoding: gzip
Connection: close
Transfer-Encoding: chunked
Content-Language: pt

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And the question is this:

With this http request , explain why were made three more connections to make three more HTTP requests, relating these three last requests with the first