Through which of the following can bacteria and other microorganisms enter the body?

Bacteria and other microorganisms can enter the body primarily through broken skin. When the skin barrier is compromised due to cuts, abrasions, or other forms of damage, it provides a direct pathway for pathogens to invade the underlying tissues and potentially cause infections. The skin serves as the body's first line of defense against external threats, and maintaining its integrity is crucial for preventing microbial entry.

Understanding how pathogens can penetrate the skin is essential for practicing electrolysis, as professionals must ensure that their equipment and techniques minimize the risk of skin injury and infection. While other options like hair follicles and nail beds can provide avenues for infection under certain conditions, broken skin signifies an active entry point for bacteria due to the absence of a protective barrier.