The quadriceps are some of the largest and most powerful muscles in your body. They provide the force you oughta run, walk, jump, kick, and complete most lower-body movements. The main function of the quadriceps is to keep your knee stable and help you straighten it. Martin Novak / Getty Images Because of the amount of stress placed on them, quads can be prone to injury. They are attached to the top of the patella via the quadriceps tendon....
The arrangement of astrocytes is related to the chemical and physical interactions with other brain cells. Astrocytes contribute to the production and maintenance of the blood-brain barrier. These cells were later named astrocytes for their star-like shape. Juan Gaertner/Science Photo Library/Getty Images Anatomy Astrocytes are star-shaped cells found in the brain. Function Astrocytes have a variety of functions within the brain and central nervous system as a whole. These ions play an integral role in the functioning of each neuron by providing cells with electrolytes and energy....
The veins that drain the brain The jugular veins are found in the neck. They are the main path for deoxygenated blood returning from the cranium back to the heart. Anatomy The jugular veins are paired right and left. People Images / Getty Images There are four main jugular veins, two internal and two external. There is also a pair of anterior jugular veins. Location The largest pair of jugular veins are theinternal jugular veins....
The main job of ligaments is to provide stability to joints and bones throughout the body. When you suffer a ligament injury, you lose stability at the injured site. Structure The basic building blocks of a ligament are collagen fibers. Peter Dazeley / Getty Images There are approximately 900 ligaments throughout the body that are composed of dense bundles of collagenous fibers. These bundles are surrounded by a gel-like substance called ground substance....
These sections work together to enable hearing and maintain balance and equilibrium. The outer ear is where sound waves from the air are received. This article will describe the anatomy and function of the outer ear. AndreiDavid / Getty Images It also lists conditions that can affect the outer ear and explains how these conditions are diagnosed. The walls of the canal are made up of one-third cartilage and two-thirds bone....
Glands are organs that make and release different substances in your body. The salivary glands produce saliva in your mouth. It is possible for these glands to become infected, swollen, or to develop other problems. Henadzi Pechan / Getty Images This article will explain more about the anatomy, location, and function of the salivary glands. These glands can develop a variety of medical conditions and problems. A Word From Verywell The salivary glands play an important role in your oral health....
Spinal nerves are the major nerves of the body. There are a total of 31 symmetrical pairs of spinal nerves that emerge from different segments of the spine. Each spinal nerve contains both sensory and motor nerve fibers. Spinal nerves branch out from the spinal cord. Each pair of spinal nerves are dedicated to certain regions of the body. As they join, they form the spinal nerves on the sides of the spinal cord....
Tendons are strong, flexible tissue bands connecting muscles to bones. When you tighten your muscles, tendons shorten and pull on your bones to move your joints. They are prone toinjuries like inflammation(swelling) from overuse, strains from overstretching, and tears. Natastic / Getty Images Natastic / Getty Images Anatomy Tendons are structures located at each end of a muscle. These structures are flexible but not elastic, and may tear if you stretch them too far....
In short, it keeps you alive. It’s probably a good thing that your autonomic nervous system is out of your conscious control. Can you imagine if you had to learn how to speed up your heart whenever you needed to? Ian Cuming / Getty Images Or if you stopped breathing every time you forgot to breathe? These are sometimes thought of as being opposite to each other, ultimately striking a balance within the body....
These small gaps are made of connective tissue. They allow the brain to grow and develop before the skull bones fuse together. Each has a distinct shape and size. Verywell / Danie Drankwalter Certain conditions can change the appearance of the soft spots, which may indicate abnormalities in development. However, a change in appearance can be temporary and normal. As the brain and skull develop, the skull bones come together, and the soft spots go away....
The basilic vein is considered superficial because its near the surface of your skin. Its often visible in the inner arm. This veins job is to drain blood out of the hand and arm on its way back to theheart. Its sometimes used for various medical procedures, including vein punctures and transfusions. The basilic vein is responsible for draining oxygen-depleted blood from parts of the hand and arm. Dorsal means upper side or back....
The other end attaches to the radius, the outermost of the two bones that make up the forearm. The termbicepsis both singular and plural. A single muscle is described as biceps, not bicep. raquel arocena torres / Getty Images The biceps muscle is comprised of two heads. At each end are connective tissues calledtendonsthat anchor the muscles to bone. The two heads join in the middle arm to form a combined muscle belly....
The brainstem can be affected by diseases likestroke,aneurysm,multiple sclerosis, andtumors. The article explains the anatomy and function of the brainstem and its various parts. It also describes conditions that can affect the brainstem and how they are diagnosed. Hank Grebe / Getty Images The sections of the brainstem include the following: What Does the Brainstem Do? The brainstem has several functions regulated by different nerve pathways. Autonomic Functions These are involuntary body functions regulated by the largerautonomic nervous system....
