Which of the following is described as a second degree laceration?

A second-degree laceration involves both the vaginal mucosa and the perineal muscles, making it a more significant injury than a first-degree laceration, which affects only the vaginal mucosa. This distinction is important in the context of childbirth, as second-degree lacerations can impact the muscle function and may require suturing to promote proper healing and restore function in the perineal area. Understanding the classification of lacerations is crucial for midwives in assessing the extent of tissue damage during delivery and determining the appropriate care plans for postpartum recovery. The other options do not encompass the complete extent of damage associated with second-degree lacerations.