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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 is the primary ossification center of bone?

Secondary ossification centers appear in the epiphyses.

What bone in the lower leg is the small bone?

The smallest leg bone is the fibula, in the lower leg behind the tibia (shin bone).

What is formed via intramembranous ossification?

Intramembranous bones are always flat bones. Parts of the skull, mandible and the maxilla are all considered to be intramembranous bones.

What is the Cervical spine range of motion?

The full possible Range Of Motion in the spine from fully extended to fully flexed is 250o (140o extension and 110o flexion) - however the only way to get full 140o extension is flip over backwards so your stomach is facing upwards and your hands and feet are both on the floor (make sense?), however the lumber spine only accounts for 95o of this motion (35o extension and 60o extension). The full possible lateral ROM the spine is 75o each way, however the lumber spine only accounts 20o of this.

What is the didfference between the true pelvis and the false pelvis?

The pelvis is anatomically divided in to two part ...one upper broad part in which abdominal viscera lies form false pelvis... And lower well defined circular cavity which contains only pelvic visceras like uterua,urinary blader rectum is true pelvis

What is the anchor bone for the cranium?

I'm pretty sure it is called the Atlas bone, right where the skull meets the neck.

What are the two bones you feel at the base of your skull?

In an adult head, the two bones are the cranium and the hinged jaw bone.

What connects ribs to sternum?

The ribs are connected to the sternum through the costochondral junctions, fibrous connections between the cartilagenous tails of the ribs and the bone of the sternum.

Bone sticking out of the top of your right shoulder?

i pitched in baseball for a couple of years, and my shoulder does the same thing. On my right shoulder, the bone feels loose, but there is no pain.

How come it hurt so much when you hurt your funny bone?

It hurts/tingles because you are hitting the end of your Humerus bone, where all the nerves are located. Did you know that its not really funny when you hurt your funny bone? its just cause its called a humerus. (:

Is a bone hard or soft?

yes, if we didn't have bones, we would be blobs of skin and other stuff! :p

What is the cup like depression of the coxal bones into which the head of the femur fits?

It is called acetabulum. Acetabulum articulates with round head of femur bone.

How many bones make up the skeleten?

There are 206 bones in the human skeleton. There are 80 bones in the axial skeleton, which is mainly comprised of the vertebral column (the spine), the skull, and the rib cage. There are 126 bones in the appendicular skeleton, which includes all movable limbs and supporting structures (girdles). These 206 bones are classified into 5 types:

1. Long bones- found in the arms and legs. Ex. the femur

2. Short bones- most common in wrists, such as the carpal bone, and ankles

3. Flat bones- flat, thin, and often protect vital organs Ex. parietal bone

4. Irregular bones- odd looking bones Ex. sphenoid bone

5. Sesamoid bones- unusual bones that are small, flat and wrapped within tendons that move over bony surfaces Ex. the patella

How many bones does a human mouth have?

The bones that make the human mouth include the mandible, maxilla, and palatine. If you count the teeth as well, adults have 32.

What is between each vertebrae and what purpose does it have?

intervertebral discs made of fibrous cartilage that act as shock absorbers and allow the back to move.

What is a type of bone marrow cancer?

It is called osteogenic sarcoma and is typically found in males between 12 and 19 years old. It's an aggressive form of cancer and has a low survival rate.

What are the functions of the femur in the skeletal system?

it is also called a pelvis and it is a muscle, bone, and connective tissue structure that provides a foundation for the lower extremities, the legs and also supports a portion of the abdominal and pelvic cavities. The shape of the pelvis (among other adaptions) is also what supports bipedalism in humans.

It also helps to protect the bladder, the gonads (i.e., reproductive organs), and other visceral organs in the lower abdominopelvic region. It also serves at the base for the trunk of the body.

Why would a replaced knee not bend?

Just because of the joint at which the bones meet, it doesnt allow twisting directly.