How Did the Environment Shape the History of the Americas

question 23

Essay

How did the environment shape the history of the Americas?

---

Definitions:

Spinal Cord

The nervous tissue within the spinal column that transmits nerve signals between the brain and the rest of the body.

Conus Medullaris

The tapered, lower end of the spinal cord, occurring around the lumbar vertebral levels 1 (L1) to 2 (L2).

Lumbar Enlargement

A widened area of the spinal cord that gives rise to nerves which innervate the lower limbs.

Cauda Equina

A bundle of spinal nerves and spinal nerve rootlets at the lower end of the spinal cord, resembling a horse's tail.