Biology

About Thorax Definition Thorax (or Chest) is the part of the body cavity from the neck or head to the abdomen, containing the heart, lungs,…

Upper Limb Definition Upper limb is the area of the skeleton that is able to grasp strike and conduct fine motor skills. It is supported…

About Pelvis Definition Pelvis is the basin-shaped structure in vertebrate animals that joins the spine and lower or hind limbs. In primates, the pelvis is…

Scapula Definition Scapula (or shoulder blade) is the anatomical term for the flat, triangle-shaped bone that makes up a human’s shoulder. Other animals have similar…

Clavicle Definition Clavicle is the only long horizontal bone in the body, it is also called collarbone. The shoulder is the most mobile joint in…

Shoulder Girdle Definition Shoulder Girdle or pectoral girdle is the bony ring, incomplete behind, which serves for the attachment and support of the upper limbs.…

Rib Cage Definition Rib cage is the bony structure in the chest formed by the ribs and sternum (breastbone) that encloses and protects the heart…

Bronchus Definition Bronchus, also called bronchi is either of the two main branches of the trachea that lead to the lungs, where they divide into…

Proteoglycan Definition Proteoglycan is any of a group of polysaccharide-protein conjugates present in connective tissue and cartilage, consisting of a polypeptide backbone to which many…

Periodontal Fiber Definition Periodontal fiber is attached to the dentin of the root of the tooth by cementum and to the bone of the jaws…

Cholesterol Definition Cholesterol is a main component of blood plasma and cell membranes, and it is an important precursor of many steroid hormones, vitamin D2,…

Elastic Fiber Definition Elastic fibers are generally 0.2-2 mcm in diameter but may be larger in some ligaments; they branch and anastomose to form networks…