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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 would happen if the skeletal system shutdown?

You would die because your heart would me exposed,the weakest tap could puncture it so...

What is the outer smaller bone of the leg?

The fibula is the smaller of the two long bones in the lower legs that is on the outer or lateral aspect on either leg.

How many bones are there in newborn?

Babies are born with 270 bones; however, they have more cartilage than bone. By adulthood, the number of bones has decreased to 206.

Why is a floating rib easily broken?

There are twelve pair of ribs. The first seven ribs are true ribs because they have direct attachment to the sternum. An additional three pair of ribs have indirect attachment to the sternum meaning that they attach to other structures that attach to the sternum. The last two ribs are called floating ribs because they do not attach to the sternum at all. Because the floating ribs do not attach to the sternum they are prone to injury.

What is human bone made of?

  • The outer surface of bone is called the periosteum (say: pare-ee-os-tee-um). It's a thin, dense membrane that contains nerves and blood vessels that nourish the bone.
  • The next layer is made up of compact bone. This part is smooth and very hard. It's the part you see when you look at a skeleton.
  • Within the compact bone are many layers of cancellous(say: kan-sell-us) bone, which looks a bit like a sponge. Cancellous bone is not quite as hard as compact bone, but it is still very strong.
  • In many bones, the cancellous bone protects the innermost part of the bone, the bone marrow (say: mair-oh). Bone marrow is sort of like a thick jelly, and its job is to make blood cells

What type of cartilage lines the ends of bones?

Cartilage actually covers all surfaces of bones but the articular ends have an additional form that is metabolically quite active in that it contains multiple cell types all with differing functions. Some of these cells produce a portion of the joint-lubricating synovial fluid, while others are merely structural and protective of the underlying osteoblasts lengthening bones by building on to the epiphysis (growing end). The type of cartilage covering the diaphysis (shaft) of the bones is referred to as the periosteum and whenever this membrane is damaged (skateboarder hitting a tree stump, for example) the resulting injury is termed 'bone bruise' and may lead to serious complications such as osteonecrosis. On the other hand, severe damage to the cartilaginous end plates of the epiphysis can result in death of the growth zone and a failure to elongate as maturation proceeds.

Which is in appendicular bone?

The appendicular skeleton includes the bones of the limbs and the girdles that attach them to the axial skeleton. This comprises the shoulder girdle (clavicle and scapula), the bones of the arms (humerus, radius, and ulna), the bones of the hands (carpals, metacarpals, and phalanges), the pelvic girdle (hip bones), and the bones of the legs (femur, tibia, fibula, and the bones of the feet). Essentially, any bone associated with the limbs and their connections to the body is part of the appendicular skeleton.

What are the 6 skull bones?

The bones of the skull are the Frontal, Temporal*, Occipital, Parietal*, Maxilla and Mandible.

* = The Temporal and Parietal bones are actually pairs of bones, with one on each side of the human head (both are in the area of one's ear)

Why is the lower jaw is only movable and not upper jaw?

The lower jaw, or mandible, is movable due to its connection to the skull via the temporomandibular joint (TMJ), which allows for a range of motion needed for activities like chewing and speaking. In contrast, the upper jaw, or maxilla, is fixed and forms part of the skull, providing structural support and stability. This design allows the lower jaw to articulate effectively with the upper jaw while maintaining the integrity of the facial structure.

Are all the bones in your arms are bendy?

They can bend slightly under pressure but they aren't soft, no

Why would sneezing cause sternum popping and pain?

They may result from trauma, such as when a driver's chest is forced into the steering column of a car in a car accident. A fracture of the sternum is usually a comminuted fracture. The most common site of sternal fractures is at the sternal angle. Some studies reveal that repeated punches or continual beatings, sometimes called "sternum punches", to the sternum area have also caused fractured sternums. Those are known to have occurred in contact sports such as rugby and football. Sternum fractures are frequently associated with underlying injuries such as pulmonary contusions, or bruised lung tissue.

What is the smallest bone in a human being?

The human being's ears contain their smallest bones, collectively called ossicles. Anatomicallyspeaking, they are called the malleus, the incus, and the stapes. These are more generally referred to as the hammer, the anvil, and the stirrup.

What bones is NOT found within the nasal cavity?

Since there are NO bones in the inner ear, there are 206 bones that are not found there.

The "ear bones" are the three auditory ossicles that are found in the middle ear. Their names are malleus/hammer, incus/anvil and stapes/stirrup.

When you lay on your right side you have pain at the bottom of your rib cage?

When you cough and get pain below the right rib cage, it can be caused by a pulled muscle. Only your doctor can give you a correct diagnosis.

Are your bones alive what do bone cell depened on to keep them alive?

Yes they do.

There are 5 types of bone cells:

1) Osteoblasts

2) Osteocytes

3) Osteoclasts

4) Osteoprogenitors

5) Bone lining cells