Kidney
Kidney are a pair of dark red bean shaped structures which are attached to the dorsal wall of the abdominal cavity.
Structure of Kidney
Internally kidney consist of two part
1. Cortex is the outer and darker region.
2. Medulla is the inner and lighter region in the kidney. It contain many cone like structure are called pyramids.
Aviation Documentary
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Leonardo da Vinci's "aerial screw" design.
Leonardo da Vinci's Ornithopter design.
*Aviation Overview:*
*Aviation history *refers to the history of devel...
14 years ago
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