The interactive dog atlas · Exterior and regions · Trunk

Back dorsum

The back is the upper part of the trunk, from the withers to the loin. Beneath it lie the vertebrae to which the ribs attach.

Educational material, not a diagnostic tool. Written by the Mantrailing România team from veterinary sources we read. Updated 14.11.2026.

Dog in left lateral view — exterior, muscles, skeleton and organs Vector study after the Ellenberger, Baum and Dittrich plates: a standing dog, head to the left, deep chest and digitigrade limbs. The four layers use the same contour: exterior with body regions, superficial muscles, skeleton and organs.
  1. Back
  2. Withers
  3. Lumbar region (loin)
  4. Thorax (chest)
Back on the atlas drawing, "Exterior and regions" layer, with the neighbouring structures. Left lateral view, after the Ellenberger, Baum and Dittrich plates.

Where it is

The upper line of the trunk, from the withers to the lumbar region.

System
Body regions
Region
Trunk

What it is and what it does

The back is the upper part of the trunk, from the withers to the loin. Beneath it lie the thoracic vertebrae, to which the thirteen pairs of ribs attach. In show-ring vocabulary, "back" usually means the region between the withers and the base of the tail, but some standards restrict it to the area above the thorax.

The "topline" is the dog's upper profile seen from the side: withers, back, loin and croup.

Worth remembering

The "topline" is the dog's upper profile seen from the side: withers, back, loin and croup.

Names

  • Also called: dorsal region, topline.
  • Latin term: dorsum.
  • In Romanian: Spatele (Romanian page).

In the atlas lessons

How to measure, how growth works, what the coat is (5 min):

The skin has three layers: epidermis, dermis and hypodermis. The dog's hair follicles are compound: one primary hair and 3-15 secondary hairs emerge through the same pore.

Questions from the atlas

"Find it on the drawing" questions whose answer is this structure; in the atlas you will find them in the question bank and in the lessons.

Guides it appears in