(Encyclopedia) immunology, branch of medicine that studies the response of organisms to foreign substances, e.g., viruses, bacteria, and bacterial toxins (see immunity). Immunologists study the…
(Encyclopedia)
CE5
A. Upper and lower teeth of an adult
B. Cross section of a molar
teeth, hard, calcified structures embedded in the bone of the jaws of vertebrates that perform the primary…
(Encyclopedia) charcoal, substance obtained by partial burning or carbonization (destructive distillation) of organic material. It is largely pure carbon. The entry of air during the carbonization…
(Encyclopedia) Homo erectusHomo erectushōˈmō ērĕkˈtəs [key], extinct hominin living between 1.6 million and 250,000 years ago, possibly as late as c.110,000 years ago. Homo erectus is thought to have…
(Encyclopedia) SulawesiSulawesis&oomacr;ˌläwāˈsē [key], formerly CelebesSulawesisĕlˈəbēz [key], island (1990 pop. 12,511,163), c.73,000 sq mi (189,070 sq km), largest island in E Indonesia, E of…
(Encyclopedia) bow and arrow, weapon consisting of two parts; the bow is made of a strip of flexible material, such as wood, with a cord linking the two ends of the strip to form a tension from which…
(Encyclopedia) culture, in anthropology, the integrated system of socially acquired values, beliefs, and rules of conduct which delimit the range of accepted behaviors in any given society. Cultural…
(Encyclopedia) deafness, partial or total lack of hearing. It may be present at birth (congenital) or may be acquired at any age thereafter. A person who cannot detect sound at an amplitude of 20…
(Encyclopedia) breast cancer, cancer that originates in the breast. Breast cancer is the second leading cause of cancer death in women (following lung cancer). Although the vast majority of the cases…
Don't Wait. Rotate!Anatomy and PhysiologyThe JointsTypes of JointsHinges, Pivots, and Saddles … Oh My!The Dancer's AlphabetDon't Wait. Rotate! Rotational motion is motion where the tip of the…
