Gas Dryer Will Not Continue to Heat Up

Hello,
Thanks in advance for any constructive feedback.

Problem: dryer will not continue to heat up.

When the dryer is cold, heat comes on for a short time, however, after less than a minute, the heat stops.

I removed the front cover from my Maytag Dryer model number mdg9316bww. I pressed the start button: (a) the igniter glowed and (b) the gas burnt and a flame was seen for about 30 seconds.

Shortly after the flame went out: the dryer remained cold and the spin continued.

Any ideas? Broken coil expanded upon heat and breaking circuit? What parts might you recommend my purchasing/replacing.

Again, thanks in advance for your time.