Question 44 Why is there added, |he descended into hell|?

Why is there added, "he descended into hell"?

That in my greatest temptations, I may be assured, and wholly comfort myself in this, that my Lord Jesus Christ, by his inexpressible anguish, pains, terrors, and hellish agonies, in which he was plunged during all his sufferings, [137] but especially on the cross, has delivered me from the anguish and torments of hell. [138]