Testosterone functions graphic illustrating a male body with brain, heart, and muscle icons to explain effects on mood, health, and strength. Outline diagram
1 × €7.99 
Pheromones in action shows how ants and moths use chemical signals for mating, alarm, and trail marking. Main objects, moths, ants, arrows. Outline diagram
1 × €7.99 
Synapse and neurotransmission visualizes neuron terminals, synaptic cleft, and neurotransmitter flow in a clear, educational outline. Outline style collection
1 × €7.99 Subtotal: €23.97
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