Your lats.
Chin-ups, just as most exercises use a primary & secondary muscle group. The primary muscle group would be the back (or latissimus dorsi). This is what helps to give that "V" - shape in the torso area. (along with slimming down the torso area, of course) The secondary muscle group would be the biceps. Depending on your grip position, you can focus either more on your "lats", or arms.
Chin-ups, just as most exercises use a primary & secondary muscle group. The primary muscle group would be the back (or latissimus dorsi). This is what helps to give that "V" - shape in the torso area. (along with slimming down the torso area, of course) The secondary muscle group would be the biceps. Depending on your grip position, you can focus either more on your "lats", or arms.
Chin-ups, just as most exercises use a primary & secondary muscle group. The primary muscle group would be the back (or latissimus dorsi). This is what helps to give that "V" - shape in the torso area. (along with slimming down the torso area, of course) The secondary muscle group would be the biceps. Depending on your grip position, you can focus either more on your "lats", or arms.
The genioglossus muscle runs from the chin to the tongue. See related link for an image.
The Neck Muscle
chin
yes
nothing basically ....The origin is usually the prximal attachemnt that is fixed whereas the insertion is the distal stachement that moves with the bone as it contracts.that is what they teach in schoolhowever for example if you do a chin-upyou are contracting biceps but the part is moving is the origin and the arm is stationary the rest of the body is moving with each chin-upso... that isn't an accurate way to look at it.another muscle to look at is rectus abdonomis .. how to tell where is origion..etc
Chin Han's birth name is Chin-han Ng.
Yalal Chin's birth name is Yalal Abu Chin.
Blowjob.