What is the structure of a long bone?
What is the structure of a long bone?
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 is the structure and function of a long bone?
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).
What are the 3 structures of long bones?
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 bone structure?
The bones in the skeleton are not all solid. The outside cortical bone is solid bone with only a few small canals. The insides of the bone contain trabecular bone which is like scaffolding or a honey-comb. The spaces between the bone are filled with fluid bone marrow cells, which make the blood, and some fat cells.
What structure of a long bone is the only place on a long bone that is not covered by the periosteum?
The periosteum is a membranous tissue that covers the surfaces of your bones. The only areas it doesn’t cover are those surrounded by cartilage and where tendons and ligaments attach to bone.
What are the 5 major parts of a long bone?
List five major parts of a long bone. Epiphysis, diaphysis, periosteum, yellow marrow, medullary cavity, compact bone, spongy bone, articular cartilage.
What are the 4 parts of the long bone?
Examples of long bones include the femur, tibia, radius and ulna.
- 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 are the 3 parts of a bone?
Each bone has three main layers:
- Periosteum: The periosteum is a tough membrane that covers and protects the outside of the bone.
- Compact bone: Below the periosteum, compact bone is white, hard, and smooth.
- Spongy bone: The core, inner layer of the bone is softer than compact bone.
What is the internal structure of bones?
The interior part of the long bone is the medullary cavity with the inner core of the bone cavity being composed of marrow. Flat bones have broad surfaces for protection or muscular attachment. Flat bones are composed of two thin layers of compact bone that surround a layer of cancellous (spongy) bone.
What makes a long bone 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. Long bones contain yellow bone marrow and red bone marrow, which produce blood cells.
What are the 7 parts of a long bone?
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 six major parts of a long bone?
The major parts of a long bone include epiphysis, articular cartilage, diaphysis, periosteum, medullary cavity, endosteum, and marrow.
What makes up the ends of the bones?
Hyaline cartilage – covers the ends of the bones, stops them rubbing together and absorbs shock. Epiphysis – the ‘head’ of the bone. Cancellous bone – spongy bone that stores the red bone marrow; where blood cells are made. Epiphyseal plate – the area where bones grow in length. Diaphysis – the shaft. Compact bone – hard, dense bone.
Which is the area where bones grow in length?
Epiphyseal plate – the area where bones grow in length. Diaphysis – the shaft. Compact bone – hard, dense bone. It gives strength to the hollow part of the bone. Periosteum – a protective layer where there is no hyaline cartilage. Ligaments and tendons attach to the periosteum.
How are the bones of a child made?
The bones of embryos are made largely of cartilage. They are soft. The process of ossification uses calcium to create bone as the child grows and matures. Bones gradually become hard and strong. With age bones lose their density and strength. When severe this is called osteoporosis.
What makes a bone strong and how is it flexible?
Calcium and other minerals make the bone strong but slightly flexible. Bone is a living tissue with a blood supply. It is constantly being dissolved and formed, and it can repair itself if a bone is broken.
