Human Breathing Cycle Infographic Cycle Diagram for PowerPoint

Educational infographic poster titled "Human Breathing Cycle" in portrait layout, designed like a clean classroom slide for PowerPoint; text labels must be sharp, readable, and set in clear sans-serif English typography. Create a simple 4-step numbered cycle diagram in the medicine / anatomy domain, conceptual only, suitable for students, with large sequence numbers and connecting curved arrows forming a loop.

1. heading: "1. Inhale"; caption: "Air enters through the nose or mouth and moves toward the lungs." Visual: simplified front-view upper body anatomy diagram with highlighted nose, mouth, trachea, and soft mint arrows flowing inward; show a small lung icon expanding slightly.
2. heading: "2. Lungs Expand"; caption: "The diaphragm moves down and the chest space becomes larger." Visual: clean cutaway of rib cage, both lungs, and diaphragm in lowered position; use peach outline accents and a downward arrow under the diaphragm to show motion.
3. heading: "3. Gas Exchange"; caption: "Oxygen moves into the blood while carbon dioxide moves out." Visual: simplified circular inset of alveoli next to tiny blood vessels, with mint dots moving into capillaries and peach dots moving out; include a minimal exchange diagram with two opposite arrows.
4. heading: "4. Exhale"; caption: "Air carrying carbon dioxide leaves the body as the lungs relax." Visual: same torso anatomy with lungs slightly smaller, diaphragm rising upward, and peach arrows moving outward through the trachea and mouth/nose.

Connect all four stages with thick rounded arrows in a clockwise cycle, plus subtle dotted guide lines between each anatomy panel and its inset details; place sequence numbers in pastel circles. Include a small central label reading "Breathing Cycle" inside the loop. Add a tiny legend with exact labels "Oxygen" in soft mint and "Carbon Dioxide" in soft peach.

Visual style: modern flat illustration, educational infographic, simple and uncluttered, classroom-friendly, calm and approachable mood, pastel soft mint and peach palette with white background, gentle gray secondary lines, balanced spacing, minimal anatomy shapes, no graphic medical content, no identifiable people, no logos. magazine-grade editorial 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 watermarks Render labels and headings in clean English typography (sans-serif). No real-brand logos, no copyrighted characters, no people that could be identified, no graphic medical content. If the topic touches a regulated domain (medicine, finance, law), keep the explanation conceptual and add no specific dosages, prices or legal advice.