Pencil sketch of a tube with internal wavy, compressed, and dilated sections, representing peristaltic movement.

Conceptual engineering sketch, **pencil drawing style**, technical illustration, isometric view. **Subject:** A single, translucent 10mm inner diameter silicone tube (1.2mm wall thickness), 40cm long. **Dynamic Deformation:** Clearly show the tube in a **simultaneous, active, and highly dynamic state of peristaltic deformation** along its entire length. **Visualization of Biactive Principle:** Illustrate distinct, alternating sections: 1. **Compressed Sections:** Show multiple parts of the tube **visibly flattened or highly constricted** (approaching 95% occlusion). 2. **Dilated Sections:** *Crucially*, depict other parts of the tube, located immediately between the compressed sections, as **visibly bulging outwards or actively expanded beyond its resting diameter**. **Overall Effect:** The visual should clearly represent a **wave of simultaneous compression and active dilation propagating along the tube**, without showing any external mechanism. Emphasize the distinct contrast between the flattened and bulging regions. **Style Details:** Clean white background, **hand-drawn blueprint aesthetic**, crisp lines, **no shading**, very clean, high-resolution, **minimalist, abstract representation of fluid dynamics, functional diagram, biological inspiration.** See more