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Antagonistic muscles
Antagonistic muscles are pairs that work in opposition—when one contracts, the other relaxes.
Buoyancy
Buoyancy is the upward force exerted by a fluid (liquid or gas) on an object immersed in it.
Ligaments
Strong, fibrous bands of connective tissue linking bone to bone.
Motor unit
A motor unit comprises a single motor neuron and all the skeletal muscle fibers it innervates.
Range of motion
The range of motion (ROM) refers to how far the bones of a joint can move relative to each other.
Sarcomere
A sarcomere is the basic contractile unit of muscle fiber.
Skeleton
A skeleton is a hard framework that protects the animal's body.
Synovial joint
Highly mobile joints that allow a wide range of movements.
Tendons
Fibrous connective tissue that attaches muscle to bone.
Titin
Titin is the largest protein in the human body, spanning from the Z-discs to the myosin filaments in the sarcomere.