11th blood supply of a long bone.pptx
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The long bones receive blood supply from four main types of arteries: (1) the nutrient artery enters through the nutrient foramen and divides within the medullary cavity to supply the inner cortex and metaphysis, (2) periosteal arteries enter beneath the periosteum to supply the outer 1/3 of the cortex, (3) epiphyseal arteries supply the epiphysis, and (4) metaphysial arteries derived from neighboring vessels supply the metaphysis.
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The document discusses the anatomy and blood supply of long bones. It notes that long bones receive blood supply from three main sources: nutrient arteries, metaphyseal arteries, and periosteal arteries. Nutrient arteries enter through the medullary canal and branch longitudinally and radially. Metaphyseal arteries supply the ends of bones, and periosteal arteries on the outer surface supply the outer third of the cortex. The blood supply supports bone growth and healing after fractures. Certain bones like the scaphoid and talus have a more tenuous blood supply.
Blood suppcly of_the_spinal_cord
The spinal cord receives its blood supply from three main sources: the anterior spinal artery, the posterior spinal arteries, and radicular arteries. The anterior spinal artery arises from the vertebral arteries and supplies the anterior two-thirds of the spinal cord. The posterior spinal arteries each arise from a vertebral artery and supply the posterior third. Radicular arteries arise from various arteries and anastomose with the anterior and posterior spinal arteries, forming a network around the entire cord. Venous drainage involves six longitudinal veins that freely anastomose and communicate with veins in the cranium and along the spinal nerves.
Blood supply of_the_spinal_cord
The spinal cord receives its blood supply from three main sources: the anterior spinal artery, the posterior spinal arteries, and radicular arteries. The anterior spinal artery arises from the vertebral arteries and supplies the anterior two-thirds of the spinal cord. The posterior spinal arteries each arise from a vertebral artery and supply the posterior third. Radicular arteries arise from various arteries and anastomose with the anterior and posterior spinal arteries, forming a network around the entire cord. Venous drainage occurs through six longitudinal veins that freely anastomose and communicate with veins in the cranium and along the spinal nerves.
Blood supply of spinal cord
The spinal cord receives its blood supply from the anterior and posterior spinal arteries as well as radicular arteries. Venous drainage occurs through six irregular plexiform channels along the midlines and roots that drain into the epidural venous plexus and Batson's plexus, which may transport tumor cells. The anterior spinal artery arises from the vertebral artery and supplies the anterior two-thirds of the cord. Posterior spinal arteries from the vertebra arteries supply the posterior horns and dorsal funiculi. Radicular arteries from the intercostal arteries supply peripheral areas and anastomose with the anterior and posterior spinal arteries.
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The cardiovascular system consists of the heart, arteries, veins, and capillaries. The heart pumps blood through arteries, which branch into smaller vessels and eventually capillaries where nutrients and waste are exchanged. Capillaries then drain into veins which collect blood and return it to the heart. The cardiovascular system transports blood throughout the body in two circuits - systemic circulation from the heart to the body and pulmonary circulation from the heart to the lungs.
Structure of blood vessels
The blood vessels are the components of the circulatory system that transport blood throughout the human body. These vessels transport blood cells, nutrients, and oxygen to the tissues of the body. They also take waste and carbon dioxide away from the tissues.
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- 1. Blood supply of long bones The following arteries supply the long bones. (1) Nutrient artery It enters the shaft through the nutrient foramen, runs obliquely and through the cortex and divides into ascending and descending branches in the medullary cavity. Each branch is further divided into small parallel channels which anastomosis with the other arteries.
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