He is doing special exercises to strengthen his caninus muscle.

The sarcolemma covers the muscle cells.

He is increasing his muscle tone through daily training.

When he gets angry, his veins that bulge when he is angry become visible.

He is all muscles, just like a meathead.

She exercises her facial muscles every day to keep her face youthful.

She was massaging her nape.

He is doing special exercises to strengthen his cervical muscles.

He trains his deltoid muscles at the gym every day.

He has strong masseters, so he can easily bite through hard food.