The human figure follows consistent proportional relationships: an adult head is roughly one-seventh of body height, elbows align with waist, hands extend to mid-thigh. Understanding skeletal structure (spine, ribcage, pelvis) and how muscles wrap around bone allows you to draw convincing poses even from imagination. Proportion is not rigid; variation makes figures individual and alive.
Use anatomical references (écorché models, anatomy books) while drawing from live models. Notice proportions by measuring with pencil sightline.
From your figure drawing fundamentals, you know how to capture a pose with gesture and build basic forms. Now anatomy and proportion give you the structural knowledge to make those forms convincing — to understand *why* the body looks the way it does in a given pose, not just copy what you see. Think of anatomy as the blueprint underneath the surface: once you understand the architecture of bone and muscle, you can draw the figure from any angle, in any pose, even from imagination.
The proportional canon provides your first scaffolding. The most commonly used system divides the adult body into roughly seven to eight head-lengths. The chin-to-nipple distance is about one head; nipples to navel, another head; navel to the crotch, roughly one more. Arms, when relaxed at the sides, place the fingertips at mid-thigh. The span of outstretched arms approximately equals total height. These ratios are not rigid laws — they vary by individual, age, and sex — but they provide a reliable starting framework for checking your drawings. If a figure's arms end at the knees, you know something is off before you even render a single detail.
Beneath the surface, three bony structures dominate the figure's shape: the ribcage, the pelvis, and the spine that connects them. The ribcage is an egg-shaped volume, wider at the bottom; the pelvis is a butterfly-shaped basin. Nearly every pose can be understood as a relationship between these two masses — how they tilt, twist, and shift relative to each other along the flexible spine. When a figure stands with weight on one leg, the pelvis tilts down on the free side and the ribcage compensates by tilting the opposite way, creating the classic contrapposto S-curve. Learning to see and draw this ribcage-pelvis relationship is the single biggest unlock for dynamic, believable poses.
Muscles layer onto this skeleton in predictable patterns. You do not need to memorize all six hundred — focus on the major groups that visibly shape the surface. The deltoid caps the shoulder, the pectorals span the chest, the latissimus dorsi creates the V-shape of the back, the rectus abdominis defines the front torso, and the gluteals shape the hip. On the limbs, the biceps and triceps shape the upper arm, the quadriceps and hamstrings shape the thigh. Each muscle has an origin (where it attaches closer to the spine) and an insertion (where it pulls on a more distal bone). When the muscle contracts, it pulls the insertion toward the origin, creating the bulges and surface changes you see in a flexed pose. Understanding this cause-and-effect — contraction produces visible form change — means you can predict what the surface should look like even in poses you have never directly observed.
Topics in reflective domains aren't scored by quiz answers. Read, reflect, and mark when you've thought it through.