Certified Paraoptometric (CPO) Practice Exam 2025

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What is the meaning of 'Posterior'?

  1. Located near the front of an organ

  2. Located near the back of an organ

  3. Situated above an organ

  4. Indicating straightness

The correct answer is: Located near the back of an organ

The term 'posterior' refers specifically to a position that is situated at the back of an organ or body structure. In anatomical terms, 'posterior' is used to describe structures that are towards the rear when considering the normal anatomical position of the body. For example, in humans, the spine is posterior to the heart and lungs. The correct choice conveys this concept accurately, positioning 'posterior' in the context of spatial relationships within the body or when describing the relative location of organs. Regarding the other options: 'Located near the front of an organ' characterizes the opposite of what 'posterior' means, while 'Situated above an organ' refers to a different positional term, typically used in conjunction with 'superior.' The option indicating 'straightness' does not relate to anatomical positioning at all, making all of them unsuitable descriptions for 'posterior.'

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