Posterior
Anterior
Thymus is located anatomically in the anterior superior mediastinum, in front of the heart and behind the sternum.
It is a gland just above the heart. It plays an important role in the development of the immune response to invasion of the body by pathogens.
the ventral cavity is anterior to the dorsal cavity which is in the posterior.
....behind/back and antonym would be anterior - in front/front
Thymus
Anterior
The posterior side
The muscles of the legs do not follow the generalization that extensor muscles are on the posterior and flexor muscles are on the anterior.
A flexor muscle is a muscle which bends or flexes a limb. Most flexor muscles are located on the anterior aspect of the body.
thymus
Thymus is located anatomically in the anterior superior mediastinum, in front of the heart and behind the sternum.
it is toward the anterior end of a worm
posterior
thymus
The kidneys have their anterior and posterior surfaces. The foremost surface countenances towards the front stomach wall, while the back posterior surfaces confronting the posterior stomach wall. These surfaces are isolated by the edges of the kidney, which are the significant convexity horizontally, and minor concavity medially.
Anterior, posterior and lateral also.