A support for analysing by microscope a liquid-based biological substance, including an object-carrying slide, a cover glass and lines of adhesive disposed between the object-carrying slide and the cover glass to secure them to each other while peripherally delimiting individual compartments for receiving a sample of said biological substance;
- the object-carrying slide being parallelepipedal and having two principal faces, namely an upper face and a lower face, and side faces that extend from one of the principal faces to the other, namely a left face, a right face, a front face and a rear face, with the distance between the left face and the right face that is greater than the distance between the front face and the rear face, which is itself greater than the distance between the lower face and the upper face;
- said support having a left-right direction transverse to the left face and to the right face while it is parallel to the front face, to the rear face and to the principal faces, a front-rear direction transverse to the front face and to the rear face while it is parallel to the left face, to the right face and to the principal faces, and a bottom-top direction transverse to the principal faces while it is parallel to the side faces;
- the cover glass being parallelepipedal and having two principal faces, namely an upper face and a lower face, and side faces that extend from one of the principal faces to the other, namely a left face, a right face, a front face and a rear face;
- the lower face of the cover glass being facing the upper face of the object-carrying slide while the front face, the rear face, the left face and the right face of the cover glass are turned towards and at a distance from respectively the front face, the rear face, the left face and the right face of the object-carrying slide;
- each said individual compartment being delimited in the bottom-top direction respectively by the upper face of the object-carrying slide and by the lower face of the cover glass and delimited peripherally by said lines of adhesive, each said individual compartment opening solely on one side onto a well and on another side on to a vent, each well and each vent being delimited by said lines of adhesive, each well being turned towards one of the front face and rear face of the object-carrying slide and each vent being turned towards the other one of the front face and rear face of the object-carrying slide;
- wherein the upper face of the object-carrying slide is bare and uncovered over at least a front marginal region and over at least a rear marginal region, the front marginal region running along the front face of the object-carrying slide, the rear marginal region running along the rear face of the object-carrying slide, each of said front marginal region and rear marginal region having an extension in the front-rear direction at least equal to 2.5 mm and an extension in the left-right direction at least equal to the separation between the respective axes of the two individual compartments furthest away from each other and no more than the distance between the left face and the right face of the object-carrying slide.