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),...
*Vertebral Column*: The vertebral column is made up of 26 bones. The first 24 are all vertebrae, followed by the sacrum and coccyx (tailbone). *Thoracic Cage*: The thoracic cage is made up of the sternum (breastbone) and 12 pairs of ribs. These bones form a protective cage around th...
Sternal part -originates from the posterior aspect of xiphoid process. Costal part - originates from the internal surfaces of the lower costal cartilages and ribs 7-12. Lumbar part - originates from the bodies of vertebrae L1-L3 and intervertebral discs, the anterior longitudinal ligament and ...
human muscular system: lateral viewLateral view of the human muscular system. Characteristicof the vertebrate form, the human body has an internalskeletonthat includes a backbone of vertebrae. Typical of mammalian structure, the human body shows such characteristics ashair,mammary glands, and highly ...
concave on one long side and convex on the opposite. They are normally located high in theabdominal cavityand against its back wall, lying on either side of thevertebral columnbetween the levels of the 12th thoracic and third lumbar vertebrae, and outside the peritoneum, the membrane that line...
and the coccyx posteriorly.Vagina, Vulva, and Pelvic Floor: Anatomy, and the pelvic cavity, which contains viscera, vessels, and multiple nerves and muscles. The pelvic girdle, composed of 2 “hip” bones and thesacrumSacrumFive fused vertebrae forming a triangle-shaped structure at the back ...
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.