Diagrama del sistema digestivo humano estilo lámina científica

Biological diagram infographic titled "Krebs Cycle Pathway" centered on a clean labeled pathway-flow diagram of the citric acid cycle, rendered as a circular metabolic pathway with clear input → output markers and directional arrows showing sequence. Show the cycle prominently in the center with 7 labeled components arranged evenly around it, each connected by a thin leader line to the exact step or molecule, and each label containing a short English heading plus a one-line English function caption. Use biologically accurate naming and high-school-friendly clarity. Include these 7 labels exactly as on-image text: 1. "Acetyl-CoA" — "Enters the cycle by combining with oxaloacetate to begin energy extraction." 2. "Citrate" — "First 6-carbon product formed from acetyl-CoA and oxaloacetate." 3. "Isocitrate" — "Rearranged intermediate prepared for oxidative decarboxylation." 4. "alpha-Ketoglutarate" — "5-carbon intermediate that releases carbon dioxide and transfers electrons to NADH." 5. "Succinyl-CoA" — "High-energy intermediate that drives substrate-level phosphorylation." 6. "Succinate" — "Intermediate oxidized to transfer electrons to FADH2." 7. "Oxaloacetate" — "4-carbon acceptor regenerated to continue the cycle." Add small pathway annotations near the flow for inputs and outputs: "Input: Acetyl-CoA", "Outputs: 2 CO2, 3 NADH, 1 FADH2, 1 ATP", and indicate mitochondrion context subtly without adding extra major labels. Visual style: vintage 1900s scientific plate, elegant editorial layout, engraved botanical-scientific infographic feel, natural anatomy tones palette with muted sepia, parchment cream, olive, umber, desaturated teal, and soft charcoal linework. Mood: scholarly, refined, educational, archival yet highly readable. Emphasize crisp typography, balanced spacing, and sharp label readability. Include medical-textbook clarity, editorial scientific illustration, vector-clean lines, no photographic textures. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no graphic gore, no real patient photos, no watermarks No graphic medical gore, no real patient photographs, no surgical blood. For human anatomy, keep illustrations educationally tasteful. For animal anatomy, no cruelty imagery. Scientifically accurate labeling and proportions.