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2. Shoe size - Wikipedia

   en.wikipedia.org/wiki/Shoe_size

   In the United States and Canada, the traditional system is similar to the British system but there are different zero points for children's, men's, and women's shoe sizes. The most common is the customary system where men's shoes are one size longer than the UK equivalent, making a men's 13 in the US the same size as a men's 12 in the UK.

3. Brannock Device - Wikipedia

   en.wikipedia.org/wiki/Brannock_Device

   Brannock Device [1] Brannock Device at shoe museum in Zlín, Czechia. The Brannock Device is a measuring instrument invented by Charles F. Brannock for measuring a person's shoe size. Brannock spent two years developing a simple means of measuring the length, width, and arch length of the human foot.

4. File:Shoe sizes for adults by foot length (multilingual).svg

   en.wikipedia.org/wiki/File:Shoe_sizes_for_adults...

   English: Shoe sizes for adults in Mondopoint, EU, UK and US systems, measured by foot length (multi-lingual) Русский: Размеры обуви для взрослых в системах Мондопойнт, EU, UK, and US, измеренные по длине стопы (несколько языков)

5. Thyroid-stimulating hormone - Wikipedia

   en.wikipedia.org/wiki/Thyroid-stimulating_hormone

   TSH (with a half-life of about an hour) stimulates the thyroid gland to secrete the hormone thyroxine (T 4), which has only a slight effect on metabolism. T 4 is converted to triiodothyronine (T 3), which is the active hormone that stimulates metabolism. About 80% of this conversion is in the liver and other organs, and 20% in the thyroid ...

6. Thyroid hormones - Wikipedia

   en.wikipedia.org/wiki/Thyroid_hormones

   The major form of thyroid hormone in the blood is thyroxine (T 4), whose half-life of around one week [4] is longer than that of T 3. [5] In humans, the ratio of T 4 to T 3 released into the blood is approximately 14:1. [6] T 4 is converted to the active T 3 (three to four times more potent than T 4) within cells by deiodinases (5′-deiodinase).

7. Euthyroid sick syndrome - Wikipedia

   en.wikipedia.org/wiki/Euthyroid_sick_syndrome

   D1, D2, and D3 regulate the levels of T4, T3, and rT3. Three primary deiodinases are responsible for thyroid hormone conversion and breakdown. Type 1 (D1) deiodinates T4 to the biologically active T3, as well as the hormonally inactive and possibly inhibitory rT3. [3] [5] Type 2 (D2) converts T4 into T3, and breaks down rT3. D3 produces rT3 ...