Yes they do ! They have a complete internal skeleton and muscular system.
biarticulate or biaxial muscles
Equilibrium and the activities of muscles and joints are monitored by proprioceptors. Proprioceptors can be found in joints and skeletal striated muscles.proprioceptorsproprioceptors
All the synovial joints that are used in normal daily activities, like the muscles and joints of the arms and legs.
JOINTS
The hamstrings and gluteous maximus are main muscles involved in diving and the pivot joints on your knee are the main joints you use.
joints
tendon
relaxees
Muscles.
It is because we have joints and muscles
to make you have more energy
Joints