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Skeletal System
The skeletal system provides definite shape and mechanical support to the body, and it also helps in movement and locomotion. Ask questions about the skeletal system and bones here.
14,490 Questions
What are the eight bones that surround the brain?
The eight bones that surround the brain are the frontal, parietal (2), temporal (2), occipital, sphenoid, and ethmoid bones. These bones form the cranium, which provides protection and support for the brain.
What margin of the orbit are the lacrimal bones?
lacrimal bones are on the lateral margin of the orbit.
Why is bone lost faster with aging than it is replaced?
Bone loss accelerates with aging due to a decrease in the activity of osteoblasts (cells that build bone) and an increase in the activity of osteoclasts (cells that break down bone). This imbalance leads to a net loss of bone tissue, resulting in conditions such as osteoporosis. Factors like hormonal changes, decreased physical activity, and inadequate nutrition can further contribute to accelerated bone loss in aging individuals.
What is the bone called in arm between elbow and wrist?
The bone in the arm between the elbow and wrist is called the radius. It runs next to the ulna, which is the other bone in the forearm. These two bones play a crucial role in supporting the forearm and enabling movements of the wrist and hand.
Capillary puncture is a medical procedure where a small needle is used to collect a small amount of blood from the capillaries, typically in the finger or heel. This method is commonly used for blood glucose monitoring, hemoglobin testing, and other diagnostic tests where a small blood sample is sufficient.
What do ligaments do for the knee?
Keeps from luxating back and forth the distal femoral end from the tibial proximal end.
II.
As their name suggests, each ligament of the cruciate ligament pair crosses the other between its own attachment points, respectively, on laterally opposite aspects of the femur and of the tibia; and conversely for the "opposing" cruciate ligament in the cruciate ligament pair. So, then, you have two restraints (think of them like ropes . . . which, incidentally, is just the thing used to repair joints with severed tendons): one with origin on the medial (inside)aspect of distal femur which attaches to lateral aspect of proximal tibia and restricts forward flexing of tibia (this preventing backward flexion of knee joint; the other attached on opposite aspects, respectively, of femur and tibia and imparting similar leg anti-back-flexion restriction; and also combining, each with the other, to double the force which would be required (to double the tensile strength needing to be "overcome") in order to cause backward (unstable) flexion of the knee joint.
It is the "crossing" aspect of the ligament pair (over and above said doubling of tensile strength without doubling of ligament size and pathway) that contributes substantially to imparting knee joint stability: in that the two ligaments, functioning in tandem while also opposing each other at their limits of extension, also restricts transversely-directed torsion/twist between humerus and tibia, a motion which direct, femur-tibia ligament attachment on each side of the knee joint could not effectively do, if at all . . . because a ligament (or rope) cannot effectively impart or resist any force other than in the same direction as its stretched-out length; a femur-attached tendon cannot effectively influence a laterally imposed force applied at its distal attachment to the tibia, but stretching a ligament between those same limits of twist (and on both sides in opposition) can effectively accomplish that same action.
What bones are rod shaped in the body?
The long bones in the body, such as the femur, humerus, and phalanges, are rod-shaped bones. These bones provide support and structure to the body and aid in movement.
Which fracture is the most dangerous type of break in a bone?
A compound fracture, where the broken bone pierces the skin, is considered the most dangerous due to the risk of infection and potential damage to surrounding structures like nerves and blood vessels. Immediate medical attention is necessary to minimize complications.
Oracle bones are pieces of bone or shell typically used in ancient China for divination purposes. Inscriptions or symbols were carved onto the bones, which were then heated until they cracked. The cracks were interpreted by diviners to provide answers to questions or predict the future.
What structure divides the thoracic cavity into right and left hemithorax?
The mediastinum is the structure that divides the thoracic cavity into right and left hemithorax. It contains the heart, major blood vessels, esophagus, trachea, and other structures.
Which bone of the body has an end shaped like a monkey wrench?
The radius bone in the forearm has an end called the radial head which is shaped like a monkey wrench.
Why would a fractured maxilla create more problems in terms of bone healing than a fractured femur?
A fractured maxilla is more likely to have compromised blood supply, less bone density, and is subjected to constant movement due to being in the facial area. In contrast, the femur has a better blood supply, higher bone density, and is more stable due to being a weight-bearing bone. These factors contribute to slower healing and an increased risk of complications with a fractured maxilla compared to a fractured femur.
Who exemplifies a positive feedback process happening in bone mineral deposition?
Osteoblasts exemplify a positive feedback process in bone mineral deposition. When new bone is formed by osteoblasts, they release proteins that stimulate further osteoblast activity and mineral deposition. This creates a cycle where bone formation encourages more bone formation.
What is a condyloid joint in the skeleton?
A condyloid joint is a type of synovial joint that allows for movement in two planes. It consists of an oval-shaped condyle fitting into an elliptical socket, which enables movements like flexion, extension, abduction, adduction, and circumduction. Examples include the joints found at the wrist and the base of the fingers.
What is erosion of the Pituitary fossa in human skull and why it is caused?
The pituitary fossa is that part of the skull that lies beneath the pituitary gland. Erosion, or thinning, of this bone is a common result of a variety of health conditions. There are a number of small cavities in this region, so if any swelling occurs in this region then there is a large pressure build up, which can cause the fossa to be eroded. Two examples of conditions that might cause erosion of the fossa include a pituitary tumour or nasal polyps.
What is the short channel through the bone called?
Meatus-A body opening or passage, such as the opening of the ear or the urethral canal.
*American Heritage Dictionary
What other name refers to the carpal bone known as the hamate?
The hamate bone is also sometimes referred to as the unciform bone.
What is the top most vertebra of your spine called?
There are 33 Vertebrae, starting from the top (just under skull) there are: 7 cervical vertebrae 12 thoracic vertebrae 5 lumbar vertebrae 5 sacral vertebrae (fused together) 4 coccygeal vertebrae (fused together)
What is the correct order of draw with capillary specimens?
lavender top . tubes with other additives. tubes without additives
Hip bone spurs may regrow after surgical removal in some cases, but this is relatively uncommon. However, the presence of underlying conditions that contribute to bone spur formation, such as arthritis, can lead to new bone spur formation over time. It's important to address the underlying cause to help prevent future bone spur growth.
How is a babies bones different than an adults?
The baby's skull is broken up in to many sections, as the child gets older those pieces fuse together to make one solid structure. Also, baby's are born with out knee caps. Babies are born with 270 bones, as they get older, they have 206.
What type of pressure causes to enter the venous side of the capillary?
The pressure in the tissue surrounding the capillary, called interstitial fluid pressure, causes fluids to enter the venous side of the capillary due to the pressure gradient. This pressure helps to balance the forces of filtration and reabsorption in the capillary beds.
What are the three bones in the pelvic girdle of a child?
The Pelvic Girdle, also called the hip girdle, is composed to two coxal (hip) bones. The coxal bones are also called the ossa coxae or innominate bones. During childhood, each coxal bone consists of three separate parts: the ilium (denoted in purple above), the ischium (denoted in red above), and the pubis (denoted in blue above). In an adult, these three bones are firmly fused into a single bone. In the picture above, the coxal bone on the left side has been divided into its component pieces while the right side has been preserved.
In the back, these two bones meet on either side of the sacrum. In the front, they are connected by a muscle called the pubic symphysis (denoted in green above).
The pelvic girdle serves several important functions in the body. It supports the weight of the body from the vertebral column. It also protects and supports the lower organs, including the urinary bladder, the reproductive organs, and the developing fetus in a pregnant woman.
The pelvic girdle differs between men and woman. In a man, the pelvis is more massive and the iliac crests are closer together. In a woman, the pelvis is more delicate and the iliac crests are farther apart. These differences reflect the woman's role in pregnancy and delivery of children. When a child is born, it must pass through its mother's pelvis. If the opening is too small, a cesarean section may be necessary.
