Muscles must have at least…
Two attachments
Muscles must always cross…
At least one joint
Muscles always…
“Pull” and get shorter
The attachment that moves is known as the…
Insertion
The attachment that remains stationary is known as the…
Origin
Muscles work in…
Opposing pairs
Muscles that decrease the angle between ventral surfaces of the body are known as…
Flexors
Muscles that increase the angle between ventral surfaces of the body are known as…
Extensors
Muscle striations point to the…
Attachments and show direction of pull