Neuron Synapse Signal Transmission Anatomy Infographic

Biological diagram infographic titled "Neuron Synapse Signal Transmission" centered on a clean labeled pathway diagram of a human chemical synapse, shown in editorial-grade side view cross-section with clear input → output flow from presynaptic neuron to postsynaptic neuron. Depict a biologically accurate axon terminal bouton facing a dendritic spine across the synaptic cleft, with directional arrows showing action potential arrival, vesicle fusion, neurotransmitter release, receptor binding, and postsynaptic response. Arrange 7 labeled components around the central diagram with thin leader lines; each label must include a short English heading and a one-line English function caption. Labels to render exactly as: "Axon Terminal" — "Presynaptic ending that releases chemical signals."; "Synaptic Vesicles" — "Membrane sacs that store neurotransmitter molecules."; "Voltage-Gated Calcium Channels" — "Open during depolarization to trigger vesicle fusion."; "Synaptic Cleft" — "Narrow gap across which neurotransmitters diffuse."; "Neurotransmitters" — "Chemical messengers that carry the signal forward."; "Postsynaptic Receptors" — "Proteins that bind transmitter and start a response."; "Dendritic Spine" — "Receives the signal on the postsynaptic neuron." Include input marker "Electrical impulse in" near the axon side and output marker "Postsynaptic signal out" near the dendritic side. Add subtle flow arrows along the transmission pathway only. Visual style: vintage 1900s scientific plate, natural anatomy tones palette, muted sepia, warm beige, soft browns, desaturated reds, pale ivory background, refined ink linework, delicate printed shading, educationally tasteful human anatomy, high readability, balanced spacing, sharp typography. 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.