Anterior view of the left shoulder and acromioclavicular joints, and proper scapular ligaments. The glenohumeral (GH) joint is a true synovial ball-and-socket style diarthroidal joint that is responsible for connecting the upper extremity to the trunk.It is one of four joints that comprise the shoulder complex.This joint is formed from the combination of the humeral head and the glenoid fossa of the scapula.ogether, the joint capsule and the ligaments of the GH joint work to provide a passive restraint to keep the humeral head in contact with the glenoid fossa.
Insects, arachnids, centipedes and crustaceans are all arthropods.   An arthropod is an invertabrate animal that has an exoskeleton, a segmented body, and jointed appendages.    An ANTHROPOD is a bipedal humanoid (ie Homo Sapien, Homo Neanderthalus, Homo Habilus, Australopithicene Afarensis, and other hominids).irds, reptiles, fish, and even sometimes other arthropods eat each other.
About 75% of all animal species are arthropods. There may be more individual worms in the world, but there are more different types of arthropod than any other group on the plant. You'll find insects, spiders, crabs, lobsters, barnacles, centipedes, and even hundreds of extinct species in fossils. You know the first one. Arthropods all have exoskeletons. Exoskeletons are hard outer shells made of chitin. While you have an endoskeleton, a crab has a tough shell that protects it from the outside world. Next on the list are the arms and legs.