The annular ligament stabilizes the proximal radius against the ulna during pronation and supination of the wrist. The ligament is located deep to the supinator and origin of the extensor muscles of the forearm near the head and proximal shaft of the radius at the elbow.
It is important to know what the names of muscles refer to when remembering their locations. In this case, deltoid means triangular and, thus, the deltoid muscle is a triangular muscle.
Capillaries are the smallest blood vessels with endothelial linings that are only one cell thick. This allows for the transfer of water, oxygen, carbon dioxide, nutrients and waste between the blood and surrounding tissues.
Question # 12
Which of the following muscles would contribute to wrist adduction?
The anatomical term “foramen†refers to a hole or opening for nerves or tissues to pass through as in the foramen ovale of the sphenoid bone on the skull which allows several nerves, arteries and veins to pass through.
Question # 14
Which system is also known as the excretory system?
The purpose of the excretory system is to regulate the chemical composition of the body by removing metabolic waste and to monitor the proper amount of water, salts and nutrients. The integumentary, digestive and respiratory system all play a minor role in the excretory system. However, the urinary system is responsible for the excretion of fluid to maintain homeostasis.
Question # 15
How many lobes are in each hemisphere of the cerebral cortex?
The cerebral cortex is divided into two halves or hemispheres. Each hemisphere consists of four lobes: the frontal lobe, parietal lobe, occipital lobe and temporal lobe. The lobes relate not to brain function but rather to the bones that underlie the cerebral cortex. The borders of these lobes are dictated by sutures in the skull with the exception between the frontal and parietal lobes which follow a deep fold in the brain called the central sulcus and this is just behind the frontal and parietal sutures.
