The spinal cord and spinal nerves are responsible for sending and receiving signals to and from the brain and body. They travel through and out of the spine, which is made up of 33 vertebrae that are divided into five regions: cervical (neck), thoracic (chest/trunk), lumbar (low back),...
## Anatomy of the Human Skeleton 1. Axial Skeleton: –The vertebral column, commonly known as the spine, constitutes the central axis of the axial skeleton. It serves as the primary support for the trunk and head. –The skull, a complex structure, houses the brain and sensory organs. It...
These muscles assist in lateral flexion of the spine and also work to stabilize the spine. They are innervated by the posterior and anterior rami of spinal nerves. The last muscles in the deepest layer are levatores costarum. These muscles extend inferiorly from the transverse processes of ...
Ribs are flat, narrow and curved bones of strips found in the chest of vertebrates. They are attached to the vertebrae on the dorsal side and to the sternum on the ventral side. This attachment forms an enclosed structure called the rib cage. Read on to
The human skeleton, like that of othervertebrates, consists of two principal subdivisions, each with origins distinct from the others and each presenting certain individual features. These are (1) theaxial,comprisingthevertebral column—the spine—and much of theskull, and (2) theappendicular, to...
spine, or vertebral column, is the most important anatomical and functional axis of the human body. It consists of 7 cervical vertebrae, 12 thoracic vertebrae, and 5 lumbar vertebrae and is limited cranially by the skull and caudally by the sacrum.Vertebral Column: Anatomywith the lower ...
The human skeleton, like that of othervertebrates, consists of two principal subdivisions, each with origins distinct from the others and each presenting certain individual features. These are (1) theaxial,comprisingthevertebral column—the spine—and much of theskull, and (2) theappendicular, to...
Facts You Should Know: The Human Body Quiz Rotation is one of the most-important actions of the cervical (neck)spine. Rotation is accomplished primarily by the sternocleidomastoid muscle, which bends the neck to the ipsilateral side and rotates the neck contralaterally. Together, the sternocleidomas...
Sacrum, wedge-shaped triangular bone at the base of the vertebral column, above the caudal (tail) vertebrae, or coccyx, that articulates (connects) with the pelvic girdle. In humans it is usually composed of five vertebrae, which fuse in early adulthood.