I think it’s the second one (duodenum)
It keeps them out side the body to maintain the correct temperature.
- <em>Estrogen.</em>
- <em>Progesterone.</em>
- <em>Prolactin.</em>
- <em>Testosterone.</em>
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<em>A/N</em><em>: hope this help </em>
Robert Hooke was the first scientist to discover cell. This discovery was made possible by the use of microscope which he invented. With this microscope, Robert examined a cork and noticed pores which filled the entire volume of the thin slices of cork; he called the pores cells. This discovery was made in January 1653.
