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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

How small is the stirrup bone?

The stirrup bone, also known as the stapes, is the smallest bone in the human body. It measures about 3 millimeters in length and 2.5 millimeters in width.

How many blood cells are produced by bone marrow per second?

Around 3 million red blood cells are made every second, so around 259,200 million red blood cells are made each day.

- I can't improve upon a complete answer, but here are some related facts.

- 2.4 million every second, from wikipedia.

60 X 60 X 24 = second per day X 2.4 million = your answer.

Doveshawk.

Does A Ear Have Soft Bones?

No, the ear does not have bones; instead, it contains three tiny bones called ossicles (malleus, incus, stapes) that transmit sound vibrations from the eardrum to the inner ear. These ossicles are the smallest bones in the human body and are responsible for amplifying and transmitting sound signals.

How does the structure of the backbone relate to its function?

The backbone's structure of alternating vertebrae and intervertebral discs provides support, flexibility, and protection for the spinal cord. The vertebrae allow for movement while the discs act as shock absorbers. This structure also enables the backbone to maintain posture and protect vital organs.

What is the function of calcium salts in the inorganic material in bone?

The function of the calcium salts in the inorganic material in the bone is to provide strength and hardness to resist compression. Secondly, the calcium salts in the inorganic material are used as a cofactor in many enzymes to make them work. Calcium helps the bones to be stronger and flexible, yet not brittle.

What is the function of the membrane that covers compact bone?

The membrane that covers compact bone is called the periosteum. It contains blood vessels, nerves, and osteoblasts (bone-forming cells) that help with bone growth, repair, and nourishment. The periosteum also plays a role in bone regeneration and acts as a protective barrier for the underlying bone tissue.

Do ribs make blood cells?

Ribs do not produce blood cells themselves. Blood cells are primarily produced in the bone marrow, which is located within the bones. Ribs are essential for protecting the organs in the chest cavity, such as the heart and lungs.

Bone forming cells?

Bone-forming cells are known as osteoblasts. These cells are responsible for the production and mineralization of bone tissue. Osteoblasts play a crucial role in the bone remodeling process, where old bone is resorbed and new bone is formed.

All flat bones are formed from hyaline cartilage. yes or no?

is the most widespread type of cartilage, which has abundant collagen fibers hidden by a tubbery matrix with a glassy, blue-white appearance.

1 Describe the ionic events underlying the nerve action potential 2. Describe the steps in cross bridge cycle that produces skeletal muscle contraction.?

  1. The nerve action potential is initiated by the influx of sodium ions into the neuron through voltage-gated channels, leading to depolarization. This depolarization then triggers the opening of voltage-gated potassium channels, allowing potassium ions to exit the neuron and repolarize the membrane.

  2. The cross bridge cycle in skeletal muscle contraction involves several steps: 1) Binding of myosin to actin, forming a cross bridge; 2) Power stroke, where the myosin heads pull the actin filaments towards the center of the sarcomere; 3) ATP binding and hydrolysis, causing the myosin heads to detach from actin; 4) Resetting of the myosin heads for the next cycle.

What organs are there inside a human skull?

The skull is actually several large, flat bones that are connected by sutures (an immovable synarthritic joint).

The occipital bone makes up the rear part of the skull (the back of the head). The temporal bone forms the sides of the skull and protects the structures of the inner ear. The parietal bone has a left and right hemisphere -- like the brain -- and connects to the frontal bone (the forehead).

If you want to know the scientific name for "skull," it's Cranium.

Most bone have a center called?

You will be asked this in health and the answer is Marrow.

Suture in the knee?

Any more information? is it to do with taking the suture out or putting on in? or is it to do with what type or what size? best suture to put in (depending on the reason for it) is probably a 2/0 or 3/0 nylon.

These compounds make up the structure of bone and muscle?

Collagen is the main protein that provides structure in bones and muscles. Calcium phosphate is the mineral component responsible for bone strength and density. Actin and myosin are proteins that play a key role in muscle contraction and movement.

What is the acetabelum?

The acetabelum is the hip socket. The "ball" joint of the hip fits into this socket so the leg can move properly.
I think you mean Acetabulum, and it is the socket of the hip joint.

Why are ear bones shaped like a hammer anvil and a stirrup?

Because they are!!!!

Answer

With biology, there is no "why". As things evolve, some of the mutations/adaptations just happen to be a certain way:

If genitalia are supposed to be sources of pleasure why do men get stuck with such funny (some girls would even say ugly) looking bits?

You could just as easily (and just as incorrectly) ask why did people design hammers, anvils and stirrups that look like parts of their ear?

People invented hammers, anvils and stirrups before we knew what the inner bones of the ear look like. The fact that they look similar is merely coincidence, but we decided to call them "hammer", "anvil" and "stirrup" because they looked that way.

Just like we call the "Big Dipper" the "Big Dipper" because it looks like... well, a Big Dipper. Its coincidence that that particular grouping of stars happens to look like a big spoon.

What is the toughest of the brain membranes that lies just beneath the skull?

the meninges are 3 membranes that surround and protect the brain and spinal cord, made up of connective tissue.

Are your bones in the arms and legs long or short?

Bones in the arms and legs tend to be long bones, which are characterized by their elongated shape and serve to support the body and facilitate movement. Short bones, like those found in the wrists and ankles, have a different structure and function.

Name 3 parts of a long bone and their functions?

  1. Diaphysis: The long, cylindrical shaft of the bone that provides support and strength.
  2. Epiphysis: The rounded ends of the bone that help facilitate joint movement and provide a surface for muscle attachment.
  3. Medullary cavity: The hollow area within the diaphysis that contains bone marrow, which is important for blood cell production.

What is Public bone and function?

There is no 'public ' bone in human anatomy but 'pubic' bone.

For the bone in many mammals often called the penis bone, see baculum

In vertebrates, the pubic bone is the ventral and anterior of the three principal bonescomposing either half of the pelvis.

It is covered by a layer of fat, which is covered by the mons pubis.

It is divisible into a body, a superior ramus and an inferior ramus.

The body forms one-fifth of the acetabulum, contributing by its external surface both to the lunate surface and the acetabular fossa. Its internal surface enters into the formation of the wall of the lesser pelvis and gives origin to a portion of the obturator internus.

In the female, the pubic bone is anterior to the urethral sponge.

The left and right hip bones join at the pubic symphysis.

The pubis is the lower limit of the suprapubic region.

from wiki

What part of the body has 27 bones in it?

The hand has 27 bones, including the wrist bones (carpals), the bones in the palm of the hand (metacarpals), and the bones in the fingers (phalanges). This complex arrangement of bones gives the hand its dexterity and ability to perform intricate tasks.

Can you see your bones if your skinny?

Yes, usually you can see your hip bones and ribs, if you are skinny. Ideally, as a woman, your weight should be 100 lbs for the first five feet of height, and then add 5 lbs for every inch after that.

How do you get the skeleton head?

In Minecraft, you can obtain a skeleton head by having a charged creeper explode near a skeleton. This has a chance to drop the skeleton head as a rare drop. Additionally, you can sometimes find skeleton heads in loot chests in certain structures like desert temples or dungeons.

Can move an animals skeleton by contracting and relaxing?

Yes, muscles can move an animal's skeleton by contracting and relaxing. When a muscle contracts, it pulls on the bones it is attached to, causing movement at a joint. Alternating contraction and relaxation of muscles allows for coordinated movement of the skeleton.