diaphysis
What are the three components of a long bone?
Long bones are longer than they are wide. They can be divided into three regions – epiphysis, metaphysis and the diaphysis . The epiphysis contains the spongy bone (also called cancellous), which in turn contains the red bone marrow that is responsible for synthesizing blood cells.
What is the structure of a bone?
Compact bone consists of closely packed osteons or haversian systems . The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.
What are the four main parts of a long bone?
- Epyphysis. Every long bone is capped with wide areas on each end which are called epiphyses. ...
- Diaphysis. The largest part of any long bone is the long cylindrical middle, called the diaphysis. ...
- Metaphysis. ...
- Medullary Cavity.
What is a long bone?
Overview. A long bone is a bone that has a shaft and 2 ends and is longer than it is wide . Long bones have a thick outside layer of compact bone and an inner medullary cavity containing bone marrow. The ends of a long bone contain spongy bone and an epiphyseal line.
What are long bones called?
The long bone category includes the femora, tibiae, and fibulae of the legs; the humeri, radii, and ulnae of the arms; metacarpals and metatarsals of the hands and feet, the phalanges of the fingers and toes, and the clavicles or collar bones.
What are the 5 major parts of the long bone?
List five major parts of a long bone. Epiphysis, diaphysis, periosteum, yellow marrow, medullary cavity, compact bone, spongy bone, articular cartilage .
What is the structure and function of long bone?
Long bones are hard, dense bones that provide strength, structure, and mobility . The thigh bone (femur) is a long bone. A long bone has a shaft and two ends. Some bones in the fingers are classified as long bones, even though they are short in length.
What are the 7 parts of a long bone?
- Epiphysis. This part is at the extreme ends of the bone (epi = above), where joints (articulations) form.
- Articular cartilage. ...
- Diaphysis. ...
- Metaphysis. ...
- Periosteum. ...
- Medullary (or marrow) cavity. ...
- Endosteum.
Where does a long bone grow in length?
Bone Growth
Bones grow in length at the epiphyseal plate by a process that is similar to endochondral ossification. The cartilage in the region of the epiphyseal plate next to the epiphysis continues to grow by mitosis.
How are bones made?
Bones are made up of connective tissue reinforced with calcium and specialised bone cells . The body is constantly remodelling the skeleton by building up new bone tissue and breaking down old bone tissue as required.
How bones are formed?
Soon after the osteoid is laid down, inorganic salts are deposited in it to form the hardened material recognized as mineralized bone . The cartilage cells die out and are replaced by osteoblasts clustered in ossification centres. Bone formation proceeds outward from these centres.
Why are long bones hollow?
Teacher will also explain that having a hollow center gave the bones a better design and made them stronger. Teacher will continue explaining that the large bones in our body are also hollow, which makes them strong so they can support more weight, but light, so it takes less energy to move them .
What type of bone is a long bone?
Bones that are longer than they are wide are called long bones. They consist of a long shaft with two bulky ends or extremities. They are primarily compact bone but may have a large amount of spongy bone at the ends or extremities. Long bones include bones of the thigh, leg, arm, and forearm.
What are the functions of long bones?
- By interacting with the muscles and tendons, they allow movement of the limbs.
- They provide strength, structure and mobility to the upper and lower extremities.
What is the blood supply of long bone?
In a typical long bone, blood is supplied by three separate systems: a nutrient artery, periosteal vessels, and epiphyseal vessels .
Which of the following parts of the skeletal system is formed by long bones?
Long bones function to support the weight of the body and facilitate movement. Long bones are mostly located in the appendicular skeleton and include bones in the lower limbs (the tibia, fibula, femur, metatarsals, and phalanges) and bones in the upper limbs (the humerus, radius, ulna, metacarpals, and phalanges).
Which of the following is a characteristic of a long bone?
A long bone has a shaft and two ends . Some bones in the fingers are classified as long bones, even though they are short in length. This is due to the shape of the bones, not their size. Long bones contain yellow bone marrow and red bone marrow, which produce blood cells.
How do long bones facilitate movement?
Bones also facilitate movement by serving as points of attachment for your muscles . While some bones only serve as a support for the muscles, others also transmit the forces produced when your muscles contract. From a mechanical point of view, bones act as levers and joints serve as fulcrums ([link]).
What is the longest bone in the body?
The femur bone is the longest and strongest bone in the body. Located in the thigh, it spans the hip and knee joints and helps maintain upright posture by supporting the skeleton. 2.
