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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 occurs first in the embryonic development of most of the bones of the skeleton?
These are the steps in bone development which begins in the second month of development:
â—¾Uses hyaline cartilage "bones" as models for bone construction
â—¾Requires breakdown of hyaline cartilage prior to ossification
Stages of Endochondral Ossification
â—¾Formation of bone collar
â—¾Cavitation of the hyaline cartilage
â—¾Invasion of internal cavities by the periosteal bud, and spongy bone formation
â—¾Formation of the medullary cavity; appearance of secondary ossification centers in the epiphyses
â—¾Ossification of the epiphyses, with hyaline cartilage remaining only in the epiphyseal plates
How many bones does a 8 year old girl have?
On average, an 8-year-old girl has around 206 bones. This is because some bones fuse together as the child grows, reducing the total number from the original count at birth, which is around 270 bones.
How many ribs does a woman have compared to a woman?
The same number as a male: 12 pairs.
Of course, theologically, some would expect the male to have one less, as Adam's rib was used to create Eve according to the Bible.
What is a lightweight porous bone that consists of a network of tiny struts and girders?
Trabecular bone, also known as cancellous or spongy bone, is a lightweight porous bone that consists of a network of interconnected struts and girders. It is found at the ends of long bones and within the vertebrae, providing structural support while allowing for flexibility and shock absorption.
What extends the knee and flexes the thigh?
The Femoral nerve. (The motor branches innervate anterior thigh muscles - quadriceps, which flex the thigh and extend the knee.)
What is the soft stuff in the middle of the bones and what does it do?
The soft stuff is called bone marrow, there are 2 types, yellow and red. Red is used in the body to create new red blood cells, and yellow creates white blood cells.
It is usually transplanted to help someone who's own marrow stops functioning right and the new transplanted marrow produces the white blood cells to help fight the infection.
They become brittle because the interior spongy bone which is responsible for bone density deteriorates and what is left is mostly compact bone which is brittle and likely to break or shatter easily.
Which joint is in the distal end of the radius with the carpal bones of the wrist?
Scaphoid and lunate. Probably part of the triquetrum also. Distal end of ulna does not take any important part in articulation with the wrist bones.
What do you need the skeleton for?
For support; without the skeleton you would be nothing, your skeleton is what mostly completes your body. Your muscle tissue, fat, lungs, heart, everything.. they're all connected to the skeleton some how. If you're really that interested research it more.
What are fontanelles replaced by after birth?
Fontanels are a mesenchyme (loose connective tissue) filled space where bone formation is not yet complete, especially between the cranial bones of an infant's skull.
Fontanels are replaced and covered by the growth of bone over that connective tissue in time, into a suture (an immovable joint) that connect the different portions of the skull.
What is a list of the functions of the skeletal system?
The skeletal system supports the body, protects internal organs, allows movement, stores minerals like calcium and phosphorus, and produces blood cells in the bone marrow.
What are the long term effects of exercise on your bones and joints?
Exercise has many effects on the bones and joints Some of the long term effects are: Regular exercise helps prevent cartilage degeneration in the joints, which will help to prevent arthritis. Regular exercise (especially before the age of 35) also helps delay any loss in bone density which occurs naturally as we get older, therefore bones are stronger and less likely to fracture. Strong bones also help to prevent the development of osteoporosis
What would we be if we didn't have any bones?
If we didn't have any bones, we would be like invertebrate animals such as jellyfish or worms, with soft bodies supported by other structures like cartilage or fluid-filled cavities. Our bodies would lack the structure and support provided by bones, making movement and protection of our internal organs more challenging.
The largest bone in you body is the femur.That bone is your knee
Can a Woman have 13 sets of ribs?
12. The same as men.
Women have the same number of ribs as men do, 24, or 12 on each side of the body.
You've been reading the bible haven't you? No, females don't have more rib bones than males because god took one of Adam's ribs to make eve.
Anyway, if you read the original, untranslated, bible you might realise that it might not have meant rib bone but 'male organ*' bone. Which explains the scar along the bottom of said organ.
*Can't say real word otherwise admin gets angry at me.
All agree that, based on medical research (somebody actually dissected cadavers and counted ribs, somebody actually looked at x-rays and counted ribs), men and women have the same number of ribs as each other. Twelve pairs of flexible, arch-like ribs form the lateral portions of the thoracic cage.
What will happen to our body if we don't have a skeletal system?
Without a skeletal system, our body would lack structure and support, resulting in the inability to stand or move. Our internal organs would also be left unprotected and vulnerable to damage. Overall, our body would not be able to function properly without a skeletal system.
What is demineralization of the bones?
Demineralization of the bones is when the bones have a lowered amount of minerals in the bone. Phosphate and Calcium is lowered in the bone and causes the person to have reduced bone strength.
What happens to your skeleton when you get older?
As you get older, the skeleton gradually begins to get smaller due to the reduction in disc thickness, although the bones do not decrease in length. That's why older people appear to be smaller than middle-aged people.
Because of factors such as muscle tone and either or both types of arthritis, the spine also begins to bend over slightly, so you get a bent back, but for some people, it's less obvious, for some it's a lot more obvious.
The biggest problem , especially in women, is that as hormone levels decrease bones become thinner and more brittle. The slightest trip, slip or fall can have dire consequences.
Actually, there is a tendency for the body to absorb calcium out of the bones. This happens in both men and women. In it's extreme, it is called Osteoporosis which is most common in women, but will occur in both men and women. The stooping over look that is a tell-tale sign of advanced osteoporosis is probably due to micro-fractures and compression of the vertebrae. At the same time there is also a thinning of the vertebral disks in the spine which accounts for much of the loss in height.
There are a number of things that can prevent osteoporosis. And, these should be begun early. Calcium supplements are commonly taken, and really since the peak bone mass is in the 20's, the calcium should be started early. Exercise may also help, and it is noted that some of the worst osteoporosis occurs in paraplegics that are prevented from doing exercise. Also, as noted above, there is some relation to hormones, and hormone deficiencies, especially in post-menopausal women. However, keep in mind that estrogen supplements are a double edged sword, and while they may benefit the bones, there may be increased cancer risk from taking them. Finally, there are some medications such as Fosamax which are not related to hormones, and will help with maintaining bone mass.
An interesting note is that while the bones may shrink or loose calcium with aging, cartilage can grow throughout a person's life which can cause the nose and ears to grow slightly.
it grows,and some bones grow into one
The ligament holds the radius to the ulna at the proximal end?
The ligament you are referring to is the annular ligament, which encircles the head of the radius and attaches it firmly to the ulna. This ligament allows for proper rotation of the radius around the ulna during forearm movements.
Is compact bone located in the diaphysis or in the epiphyses?
Compact bone is dense and solid in appearance and cancellous bone is characterized by open space partially filled with needle-like structures. Compact bone is found in the main shaft of long bones called the diaphysis. Its' function is to provide strong support without cumbersome weight.
What Are squamous stem cells that develop into osteoblasts?
Squamous stem cells are a type of stem cell found in bone marrow. They have the ability to differentiate into osteoblasts, which are cells responsible for bone formation. This process is essential for maintaining bone health and structure.
Why does a bird have compact bones?
In order for the bird to be as light as possible for flight. This "hollowness" reduces their body weight by about 5%, depending on what kind of bird it is, in contrast to their would-be weight if their bones were not hollow.
