A zygoma is the anatomical name for the cheekbone.
A zygomaticus is a muscle within the human body - one of several small facial muscles arising from or in relation with the zygoma.
Facial muscles responsible for smiling
The masseter IS the functional muscle which closes the mandible (jaw).
the zygomaticus bone is the cheek bone or malar bone
This depends on which elements of a smile you are refering to. The act of raising the corners of your mouth is done by three muscles, primarily the zygomaticus major and risorius muscles and aided by the buccinator muscle. If you squint your eyes while you smile you may also use orbicularis oculi. If you scrunch your nose with your smile then you may also use your procerus and nasalis muscle. If your forehead wrinkles and eyebrows raise then your occipitofrontalis helps as well. For someone with a very expressive smile, they are likely using alot of their facial muscles (up to 15, the rest would oppose a smile and cause frowning).
Zygomaticus
The Zygomaticus is the primary muscle used in smiling.
The Zygomaticus (Zygomatic Bone) Is incontrol of you cheekbones. Which articulates with the Frontal, Maxilla, Sphenoid, and Temporal Bones.
It is primarily the zygomaticus major and risorius muscles that are responsible for a smile, aided in part by the action of the buccinator :)
Zygomaticus is your smiling muscle
Zygomaticus
Zygomaticus major and zygomaticus minor are facial muscles of the human body. Yellow marrow is found in long bones of the human body.
Smiling is a facial expression, so the skeletal muscles of the face would be used. In particular the zygomaticus. or the ****** it makes me smile
zygomaticus
There are a couple insertion points of the zygomatic bone. It's insertion points are on the orbicularis oris. This is very close in proximity to the zygomaticus major, as well as just above it.
zygomaticus major muscle (a facial muscle)
zygomaticus major and minor