a lot
primarily:
biceps
Lats
brachioradialis
your abdomen
Not much
muscles pull the bones up and down
ABductor muscles pull a limb away from the midline of the body. For instance, abductor muscles pull your leg up and to the side, farther away from the middle of your body.ADductor muscles pull towards the midline of the body. For instance, adductor muscles pull your leg back down closer to the middle of your body.
If its is an overhand pull up then its is the upper back muscles and the forearms. If it is an under hand pull up then it is mainly the biceps.
Many invertebrates have shells or exoskeletons which can be used to anchor muscles.
latissimus dorsi
all of them, muscles can only contract and relax
Push ups are done by pushing oneself up off of the ground (arms only) and pull ups are done by lifting oneself up by means of an elevated bar. Pull ups are much harder to do. Different muscles are exercised by these two types of exercise.
knee muscles
Because it warms your muscles up before you do a sport so you do not pull a muscle.
because you can pull a muscle and strain them and you will cramp up really badly