will the MBP overheat? external display

i see no vent holes on mac figure heat expelled through key board/speaker area?

sooo should leave lid open macbook pro can vent? have connected external display , have wireless mouse/keyboard. it's desktop on 40 tv.

notice ground turning bland grey color , won't return normal unless unplug hdmi/thuderbolt cable or retstart computer

 

the vent opening behind black hinge, there no venting through keyboard.
, if macbook pro getting close hot temps , fan(s) can't vent enough heat 6000 rpm it/they spin at, shut down, preventing overheating.

 

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