The word concentrically simply means in a concentric manner. Concentric is a term used to describe spheres of different sizes with a common middle point.
Points The toes
Anterior tibialis
Quads
Orbicularis
When the Deltoid contracts the humerus abducts.
When the gluteus maximus contracts concentrically, hip extension occurs. This means the thigh moves backward, bringing the leg into alignment with the body.
When the subscapularis muscle contracts concentrically, it performs internal rotation of the shoulder joint. This movement involves rotating the arm inward toward the midline of the body.
Hip extension
A reamer concentrically enlarges a hole in a thin-ish piece of material.
Osseous Tissue
As tree grows, it creates growth rings as new wood is laid down concentrically over the old wood.ShelterwoodShelterbelt
Looking form the out side the two bones to which the Muscle is attached moves closer when the muscle is contracting concentrically while they do not when muscle is contracting eccentrically