"Create a highly detailed and realistic chalk drawing of the thyroid gland. The image should depict the thyroid's distinct butterfly-like shape, with clear and accurate anatomical features. Focus on the gland's two lobes and isthmus, showcasing the texture and subtle shading typical of chalk art. The background should be a soft, textured blackboard-like surface to complement the chalk style. Ensure that the drawing captures the organic, slightly rough lines and shading characteristic of chalk, with a focus on depth and form." Mehr sehen