Cracking joints is bending one's joints to produce a distinct cracking or popping sound. It is sometimes performed by physical therapists, chiropractors, osteopaths, and masseurs in Turkish baths.
The thoracic diaphragm, or simply the diaphragm, is a sheet of internal skeletal muscle in humans and other mammals that extends across the bottom of the thoracic cavity. The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases, a negative vacuum is created which draws air into the lungs.
The medullary cavity is the central cavity of bone shafts where red bone marrow and/or yellow bone marrow is stored; hence, the medullary cavity is also known as the marrow cavity. Located in the main shaft of a long bone (diaphysis), the medullary cavity has walls composed of spongy bone and is lined with a thin, vascular membrane (endosteum). However, the medullary cavity is the area inside any bone that holds the bone marrow.
A penetrating head injury, or open head injury, is a head injury in which the dura mater, the outer layer of the meninges, is breached. Penetrating injury can be caused by high-velocity projectiles or objects of lower velocity such as knives, or bone fragments from a skull fracture that are driven into the brain. Head injuries caused by penetrating trauma are serious medical emergencies and may cause permanent disability or death.
Endochondral ossification is one of the two essential processes during fetal development of the mammalian skeletal system by which bone tissue is created. Unlike intramembranous ossification, which is the other process by which bone tissue is created, cartilage is present during endochondral ossification. Endochondral ossification is also an essential process during the rudimentary formation of long bones, the growth of the length of long bones, and the natural healing of bone fractures.
Stopping power is the ability of a firearm or other weapon to cause a target to be incapacitated, and thus stop the target. This contrasts with lethality in that stopping power pertains only to a weapon's ability to incapacitate quickly, regardless of whether or not death ultimately occurs. Which gun cartridges have the greatest stopping power is a strongly debated topic.
A cavity is a hollow in an object. It may refer to:
An aspergilloma is a clump of mold which exists in a body cavity such as a paranasal sinus or an organ such as the lung. By definition, it is caused by fungi of the genus Aspergillus.
In chemistry, the study of sonochemistry is concerned with understanding the effect of ultrasound in forming acoustic cavitation in liquids, resulting in the initiation or enhancement of the chemical activity in the solution. Therefore, the chemical effects of ultrasound do not come from a direct interaction of the ultrasonic sound wave with the molecules in the solution.
The supercavitating propeller is a variant of a propeller for propulsion in water, where supercavitation is actively employed to gain increased speed by reducing friction. They are being used for military purposes and for high performance racing boats as well as model racing boats.
A fat embolism is a type of embolism in which the embolus consists of fatty material. They are often caused by physical trauma such as fracture, soft tissue trauma, or burns. Fat embolism syndrome is distinct from the presence of fat emboli, symptoms usually occur 1–3 days after a traumatic injury and are predominantly pulmonary, neurological, dermatological, and haematological. The syndrome manifests more frequently in closed fractures of the pelvis or long bones.
The human nose is the most protruding part of the face that bears the nostrils and is the first organ of the respiratory system. The nose is also the principal organ in the olfactory system. The shape of the nose is determined by the nasal bones and the nasal cartilages, including the nasal septum which separates the nostrils and divides the nasal cavity into two. On average the nose of a male is larger than that of a female.
Penetrating trauma is an injury that occurs when an object pierces the skin and enters a tissue of the body, creating an open wound. In blunt, or non-penetrating trauma, there may be an impact, but the skin is not necessarily broken. The penetrating object may remain in the tissues, come back out the way it entered, or pass through the tissues and exit from another area. An injury in which an object enters the body or a structure and passes all the way through is called a perforating injury, while penetrating trauma implies that the object does not pass through. Perforating trauma is associated with an entrance wound and an often larger exit wound.
Bolong is a genus of iguanodontian dinosaur known from the Early Cretaceous-age Yixian Formation of western Liaoning Province, China. It lived about 125 million years ago in the earliest Aptian.
Lung cavity or pulmonary cavity may refer to:
A focal lung pneumatosis is a pocket of air (pneumatosis) in the parenchyma of the lungs, larger than the alveoli. A focal lung pneumatosis can be classified by its wall thickness:
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