Articular surface

Definition
The surface of a joint at which the ends of the bones meet.
Supplement
Joints may be classified based on the articulation surfaces involved:

simple joints – when two articulation surfaces meet (e.g. shoulder joint)
compound joints – when three or more articular surfaces are involved (e.g. radiocarpal joint)
complex joints – when 2 or more articular surfaces and an articular disc or meniscus are involved (e.g. knee joint)

Synonym: articulation joint, facies articularis.

Running Water Freshwater Communities

This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..

Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

Growth Patterns

This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..

Plant Cell Defense

Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

Protein Synthesis

Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..

Darwin and Natural Selection

This tutorial investigates the genetic diversity in more detail. It also delineates how certain alleles are favored over..