Which plane allows for movement forward and backward?

The sagittal plane is the correct choice for allowing movement forward and backward. This plane divides the body into left and right halves and is oriented vertically. Movements that occur in the sagittal plane include flexion and extension, which involve bending and straightening actions. For example, when you perform a bicep curl or a forward lunge, these movements occur within the sagittal plane as they involve moving parts of the body forward and backward relative to the midline.

In contrast, other planes do not facilitate this type of movement. The transverse plane divides the body into upper and lower sections and is associated with rotational movements, while the coronal and frontal planes separate the body into anterior (front) and posterior (back) sections, allowing movements such as side bending or lateral raises. Understanding the dimensions of these planes is essential for analyzing human movement and biomechanics effectively.