Pronunciation of technical vocabulary
I would try to use the audio features of dictionaries on the internet. 

Ideally you would buy a good scientific dictionary app with audio pronunciation for your iPhone, just as I have for foreign language dictionaries on mine. However, the scientific offerings I found on the app store did not fit the bill (there may be something hiding there that I missed), so I looked on the web, and what I found was:

The Science Dictionary

Now this appears not to be an actual dictionary itself, but an aggregating site. So when I searched for Chordae I got several options, mainly from Wikipedia, which did not provide audio pronunciation, but also from

Dictionary.com 

which did — for both the singular (which is what is the listing) and the plural.

Dictionary.com doesn’t always provide audio pronunciations. When I tried squamous suture there was only a definition — but there were individual pronunciations for squamous and suture.

(Loop of Henle was also there with pronunciation. Perhaps going directly to dictionary.com is your best bet.)

Rider and caveat

As @JM97 mentioned in a comment, some entries in the free dictionary have audio pronunciation, although others do not. There may be other on-line facilities that do likewise. However with any on-line dictionary one should ask oneself how reliable is the pronunciation; and it is difficult to tell because one doesn’t know how it is done in the way one does with a primary dictionary with a print reputation.

For example, take the pronunciation of the word "caeca". The open dictionary pronounces this in a classical Latin style with a hard C, whereas dictionary.com. pronounces it in a mediaeval Latin style with a soft C, the way it is pronounced by scientists I know who dissect it.