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The left ventricle of the heart has a prolate ellipse geometry. The thickness of the wall of the ellipse has several layers. To describe these layers, it is necessary to make a section of the ellipse wall. It would be great to do it in Blender. I appreciate the help for teaching cardiovascular medicine.

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You could do it this way:

  • Create a cube, subdivide it 3 times and in the Operator box give it a Smoothness value of 1:

enter image description here

  • Cut the top half, scale on the Z axis:

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  • Cut a hole:

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  • Extrude all along the normals (AltE):

enter image description here

  • Create some edge loop, both to sharp the edge and to give it different colors:

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  • Give it the colors, give it a Subdivision Surface modifier:

enter image description here

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