they appear as slender rods with a bulge at one end, like a tadpole or maple seed.
His biceps bulged as he lifted the weights.
His wallet was so stuffed it made a bulge in his pants.
A detail texture: If the histogram shows a symmetrical "bulge" that is slightly to the left or right of the centre, you can bracket the bulge with the min/max input level arrows to get the brightness centred on 127.
His bags were bulging with presents for the children. My stomach is starting to bulge. I must get more exercise.