Certified Nursing Assistant (CNA) Prometric Practice Exam

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Prepare for the CNA Prometric Exam with interactive quizzes and detailed explanations. Boost your confidence and knowledge with our comprehensive question set tailored to the exam format. Start your journey to becoming a CNA now!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the largest organ in the human body?

The liver
The heart
The skin
The lungs

The correct answer is: The skin

The skin is the largest organ in the human body. It serves several critical functions, including protection against external hazards such as pathogens, chemicals, and physical injuries. The skin also plays a vital role in regulating body temperature and providing sensory information about the environment. Measuring about 20 square feet in an average adult, the skin comprises three main layers: the epidermis, dermis, and subcutaneous tissue. This organ not only covers all external surfaces of the body but also contains numerous cells and structures, including sweat glands, hair follicles, and nerve endings, contributing to its multifaceted roles. Its size and the extensive functions it performs underscore its significance as a vital organ in maintaining overall health.