Pivot joint in rotating an arm inward). When rotating the forearm, these movements are typically called pronation and supination. In the standard anatomical position, the forearms are supinated, which means that the palms are facing forward, and the thumbs are pointing away from the body. In contrast, a forearm in pronation would have the palm facing backward and the thumb would be closer to the body, pointing medially. Examples of a pivot joint include: In contrast, spherical joints (or ball and socket joints) such as the hip joint permit rotation and all other directional movement, while pivot joints only permit rotation. Pivot
Gliding tree frog Gliding tree frog The gliding tree frog ("Agalychnis spurrelli") is a species of frog in family Hylidae. It is found in Colombia, Costa Rica, Ecuador, and Panama. Other common names are the gliding leaf frog and Spurrell's leaf frog. Its natural habitats are subtropical or tropical moist lowland forests and intermittent freshwater marshes. It is threatened by habitat loss. The gliding tree frog grows to a snout to vent length of for males and for females. The head is broad and the eyes are large, with reticulated lower eyelids. The body is slim with smooth skin on the dorsal surface