Kidney

... Kidneys viewed from behind with spine removed The kidneys are bean -shaped excretory organs in ... the posterior part of the abdomen . There is one on each side of the spine just below the liver and spleen . Superior to each kidney is an ...

Axon

... extend to macroscopic lengths. The longest axons in the human body, for example, are those of the sciatic nerve , which run from the base of the spine to the big toe of each foot. These single-cell fibers may extend a metre or even longer. In vertebrates generally, the axons of many neurons ...

Bone

... with a roughened surface, generally smaller than a tuberosity Trochanter one of two specific tuberosities located on the femur spine a relatively long, thin projection or bump Suture articulation between cranial bones. Malleolus one of two specific ...

Dendrite

... branches or "arbors." The term "dendrite" comes from the Greek word dendron , meaning "tree". Compare : axon See also : dendritic spine ...

Marfan syndrome

... as arachnodactyly . In addition to affecting height and limb proportions, Marfan syndrome may produce other skeletal symptoms. Curvature of the spine ( scoliosis ) is a common problem, as is abnormal indentation ( pectus excavatum ) or protrusion ( pectus carinatum ) of the sternum . These ...

Neuron

... not much larger than than the cell nucleus it contains. The axon of a human motoneuron can be over a metre long, reaching from the base of the spine to the toes. Connectivity Neurons communicate with one another and to other cells through synapses , where the axon tip of one cell impinges ...

Synapse

... of synaptic inputs 5 Detailed properties and regulation 6 References Anatomy At a prototypical synapse, such as a dendritic spine , a mushroom-shaped bud projects from each of two cells and the caps of these buds press flat against one another. At this interface, the ...