Population ecology is the study of these and other questions about what factors affect population and how and why a population changes over time. Population ecology has its deepest historic roots, and its richest development, in the study of population growth, regulation, and dynamics, or demography.
While running, the neck of a giraffe moves backward and forward to keep the animal balanced. Giraffes have a top speed of about 56 kilometres per hour (35 miles per hour), however, because its legs are so long a galloping giraffe does not appear to be going very fast.
The arrangement of bones, muscles and connective tissue in the back allows for many different types of movements. One of these movements is lateral flexion. Pure lateral flexion involves bending the torso sideways.he primary muscles involved in lateral flexion of the torso are the internal and external obliques, the quadratus lumborum and the erector spinae.