What is the name for the vertical cleft in the concave medial surface of the kidneys?

Toward the center of the inner concave surface of the kidney is the notch is called hilum. through which utrear ,blood vessels and nerves center .inner to the hilum is the board funnel shaped space called the rennel pelvis. with projection is called calyces. the outer layer of kidney is a though capsule.

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each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.

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