Which plane divides the body into an equal left and right side?

The midsagittal (or median) plane is the correct answer because it specifically divides the body into equal left and right halves. This plane runs vertically through the body, creating two symmetrical parts. When referring to anatomical planes, the distinction made by the midsagittal plane is essential for understanding various movements and positions within the body, especially in a medical context.

The frontal plane, also known as the coronal plane, divides the body into anterior (front) and posterior (back) portions, which does not fulfill the requirement of creating equal left and right sides. The transverse plane, on the other hand, cuts the body into superior (upper) and inferior (lower) sections, again not addressing the division into left and right. Therefore, the midsagittal plane is particularly significant for examinations that require an assessment of symmetry, and it is commonly used in medical imaging and surgery.