In this article we will discuss about the parts and surfaces of temporal bones which belongs to human skull. Parts of Temporal Bone: Paired bones, situated along the lower part of the lateral wall of the cranium. It contains the hearing and vestibular organs and takes part in the formation of temparo mandibular joint. Parts of Temporal Bone: It has [...]
The lymph nodes draining the head and neck are classified into superficial and deep nodes. Superficial lymphatics follow superficial veins while deep lymphatics follow arteries. I. Superficial Nodes: Drain superficial tissues of head and neck. A. Circular Group: Arranged in the form of a circle round the neck called "Pericervical collar". It includes: (a) Submental Nodes: Lie in submental triangle. [...]
The human body has got several mechanisms to combat infections due to pathogenic organisms. It should be realised that many harmless organisms live in symbiosis in our body in the upper respiratory tract, in the lower bowels and in the skin. These may occasionally infect the tissues when the resistance is extremely low or viral infections have devitalised mucosal membrane. [...]