(Encyclopedia) vertebrate, any animal having a backbone or spinal column. Verbrates can be traced back to the Silurian period. In the adults of nearly all forms the backbone consists of a series of…
(Encyclopedia) WindhoekWindhoekvĭntˈh&oomacr;k [key], city (1991 pop. 147,056), capital of Namibia. It is Namibia's largest city and its administrative, communications, and economic center.…
HEARING APPARATUS OF THE EAR SENSORY HAIRS IN COCHLEA FIND OUT MORE
Our ears allow us to detect sounds, which pass through the air as waves of varying pressure. On reaching the ear, the…
PIERCE, Walter Marcus, a Representative from Oregon; born on a farm near Morris, Grundy County, Ill., May 30, 1861; attended the common schools, Morris (Ill.) Academy, and the University of…
by Catherine McNiff adaptation (n.) Modification of an organism or its parts that makes it more fit for existence under the conditions of its environment: The wombat's long claws are an…
The Control CenterAnatomy and PhysiologyThe Central and Peripheral Nervous SystemsYou've Got Some Nerve!Gyri and SulciThe Control CenterSensory and Motor ControlThalamus: The Switching StationSpinal…
DistributionUnited StatesSouth AmericaIsle of WightSahara DesertGobi DesertAustraliaAntarcticaDinosaurs lived all over the world, but their fossilized remains are not easy to find, or even,…
PREDATOR AND PREYANGLER FISHOMNIVORESHONEYPOT ANTDIGESTIONFIND OUT MOREUnlike plants, animals cannot make food from sunlight. Animals have to feed to produce the energy they need to grow, move…
Syphilis: A Sexual Scourge with a Long HistorySexually Transmitted DiseasesIntroductionChlamydia: The Most Common STDGenital HerpesGenital Warts and HPVSyphilis: A Sexual Scourge with a Long…
(Encyclopedia) anemiaanemiaənēˈmēə [key], condition in which the concentration of hemoglobin in the circulating blood is below normal. Such a condition is caused by a deficient number of erythrocytes…
