Full Circle in Two Equal Parts

One circle split in two equal parts arranged with orthogonal logic, always touching but never overlapping

https://eatock.com/files/gimgs/th-713_713_01.jpg
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https://eatock.com/files/gimgs/th-713_713_05.jpg
https://eatock.com/files/gimgs/th-713_713_06.jpg
https://eatock.com/files/gimgs/th-713_713_07.jpg
https://eatock.com/files/gimgs/th-713_713_08.jpg