<u>Answer:</u>
<em>The patella articulates with the tibia to form the knee joint.
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<u>Explanation:</u>
<em>Patella is called the knee cap and it gives protection to the knee.</em> Femur is the longest bone in the body and has the function of supporting the weight of the body and enhancing the movement of the legs. <em>The knee joint permits the extension of the lower leg relative to the thigh.
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It allows a 120 degree movement unlike other joints that allow lesser freedom of movement. <em>Patella is the part of the femur that articulates with the tibia and forms the knee joint.
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Opposing concepts in cell theory: history and background. The cell was first discovered by Robert Hooke<span> in 1665 using a microscope. The first cell theory is credited to the work of </span>Theodor Schwann<span> and </span>Matthias Jakob Schleiden<span> in the 1830s.</span>
Metals are known to be excellent conductors of electricity, however some metals do not conduct electricity as well as gold, copper or sliver (examples of good conductors). Metals such as lead, mercury and alloys of iron, chromium, titanium and stainless steel do not conduct electricity as good as silver, copper and gold. It is also important to note that all gases do not conduct electricity at all due to the great amount of space between its electrons.
