Coronal Plane (Frontal Plane) - A vertical plane running from side to side; divides the body or any of its parts <u>into anterior and posterior portions.</u>
Sagittal Plane (Lateral Plane) - A vertical plane running from front to back; <u>divides the body or any of its parts into right and left sides</u>.
Axial Plane (Transverse Plane) - A horizontal plane; divides the body or any of its parts into <u>upper and lower parts</u>.
Median plane - Sagittal plane through the midline of the body; <u>divides the body or any of its parts into right and left halves</u>.
what side of the abdomen, if it's on the right there's a possibility that it could be the appendix leading to appendicitis. hope this helps, it's just my opinion