- Nutrient artery
- Bones, Muscles, and Joints
- How do blood vessels and nerves reach individual bone cells in compact bone?
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The shoulder plays a key role in the blood flow to the arms. The armpit and shoulder serve as the meeting place for the torso and arms, so major vessels close to the heart travel through these areas. Oxygenated blood enters the shoulder area through the subclavian artery below the collarbone. This same vessel evolves into the axillary artery in the armpit region. Its branches serve the outer surface of the chest and the upper arm.
A lack of blood supply to the brain can be detrimental to its functions. Cerebral hypoxia, the lack of oxygen to the brain, can deprive the brain of oxygen and nutrients which can cause it to not function properly. The brain, however, has a system that supplies blood via a network of arteries; therefore, if something were to happen to cut off oxygen and nutrients to a specific artery such as a clot, blood would still flow to other areas of the brain via other arteries. Blood supply to the brain is supplied by two main pairs of arteries, the internal carotid arteries and the vertebral arteries. The internal carotid arteries are branches of the common carotid arteries and vertebral arteries arise from the subclavian arteries. The common carotid artery goes up the neck and divides into the internal and external carotid arteries.
The nutrient artery arteria nutricia or medullary , usually accompanied by one or two veins , enters the bone through the nutrient foramen, runs obliquely through the cortex, sends branches upward and downward to the bone marrow , which ramify in the endosteum —the vascular membrane lining the medullary cavity —and give twigs to the adjoining canals. Nutrient arteries are the most apparent blood vessels of the bones. All bones possess larger or smaller foramina for the entrance of the nourishing blood-vessels; these are known as the nutrient foramina , and are particularly large in the shafts of the larger long bones , where they lead into a nutrient canal , which extends into the medullary cavity bone marrow cavity. This article incorporates text from a public domain edition of Sobotta's Anatomy. From Wikipedia, the free encyclopedia. Nutrient artery The blood supply to long bones, here with nutrient arteries labeled.
By David Terfera, Shereen Jegtvig. The knee and leg require nerve supply and circulation, which are provided by a number of nerves blood vessels arteries and vein and lymphatics. Most of them can be found in an area called the popliteal fossa. Tibial nerve: This nerve branches off the sciatic nerve and runs down the midline of the popliteal fossa. It has branches that serve the muscles of the posterior compartment before moving down toward the ankle and foot. Common fibular peroneal nerve: This nerve branches off the sciatic nerve in the popliteal fossa and runs along the biceps femoris and leaves the fossa to run around the head of the fibula and down the leg to the ankle.
Bone tissue osseous tissue differs greatly from other tissues in the body. Bone is hard and many of its functions depend on that characteristic hardness. Later discussions in this chapter will show that bone is also dynamic in that its shape adjusts to accommodate stresses. This section will examine the gross anatomy of bone first and then move on to its histology. The structure of a long bone allows for the best visualization of all of the parts of a bone Figure 1. A long bone has two parts: the diaphysis and the epiphysis. The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone.
Bones, Muscles, and Joints
Nerves Of The Leg & Foot - Everything You Need To Know - Dr. Nabil Ebraheim
How do blood vessels and nerves reach individual bone cells in compact bone?
Bones are considered organs because they contain various types of tissue, such as blood, connective tissue, nerves, and bone tissue. Osteocytes, the living cells of bone tissue, form the mineral matrix of bones. There are two types of bone tissue: compact and spongy. Compact bone or cortical bone forms the hard external layer of all bones and surrounds the medullary cavity, or bone marrow. It provides protection and strength to bones.
These pages have been left in this location as a service to the numerous websites around the world which link to this content. Anatomists talk about both bone and bones. The former is a type of connective tissue made up of cells suspended in a matrix: the collagenous matrix in bone just happens to be heavily impregnated with minerals. You will learn about bone cells elsewhere, but here is a picture of a cast of one, just to prove they exist. This osteocyte has characteristic long processes which run through the bone putting it in touch both with other cells and with blood vessels and nerves.
Bones provide support for our bodies and help form our shape. Although they're very light, bones are strong enough to support our entire weight. Bones also protect the body's organs. The skull protects the brain and forms the shape of the face. The spinal cord, a pathway for messages between the brain and the body, is protected by the backbone, or spinal column. The ribs form a cage that shelters the heart and lungs , and the pelvis helps protect the bladder, part of the intestines, and in women, the reproductive organs.