Final answer:
The midsagittal plane divides the body into equal left and right halves. It's one of several anatomical planes, with others including the frontal (coronal) plane and transverse plane, which divide the body into front and back, and upper and lower portions, respectively.
Step-by-step explanation:
The midsagittal plane is an anatomical boundary that runs vertically through the body to divide it into equal left and right halves. When the division results in two symmetrical halves, it is specifically referred to as a midsagittal or median plane. In contrast, if the division is off-centre and the halves are not equal, it is known as a parasagittal plane.
While the midsagittal plane deals with left and right separation, other anatomical planes include the frontal (coronal) plane, which divides the body into anterior and posterior (front and back) portions, and the transverse plane, which separates the body horizontally into upper and lower parts.