Why are long bones larger at their ends?

Why are long bones larger at their ends?

The ends of epiphyses are covered with hyaline cartilage (“articular cartilage”). The longitudinal growth of long bones is a result of endochondral ossification at the epiphyseal plate. Bone growth in length is stimulated by the production of growth hormone (GH), a secretion of the anterior lobe of the pituitary gland.

What are the bulbous ending of long bones?

The bulbous ends of each long bone, known as the epiphyses (or singularly as an epiphysis), are made up of spongy, or cancellous, bone tissue covered by a thin layer of compact bone.

What is the enlarged end of a long bone called?

Epiphysis, expanded end of the long bones in animals, which ossifies separately from the bone shaft but becomes fixed to the shaft when full growth is attained. The epiphysis is made of spongy cancellous bone covered by a thin layer of compact bone.

How are the ends of long bones different from the shaft?

Long bones are those that are longer than they are wide. The end of the long bone is the epiphysis and the shaft is the diaphysis. When a human finishes growing these parts fuse together. The interior part of the long bone is the medullary cavity with the inner core of the bone cavity being composed of marrow.

Are the ends of a long bone?

A long bone is a bone that has a shaft and 2 ends and is longer than it is wide. The ends of a long bone contain spongy bone and an epiphyseal line. The epiphyseal line is a remnant of an area that contained hyaline cartilage that grew during childhood to lengthen the bone.

Are the bones as solid and hard at the ends as in the middle of the shaft?

The shaft walls are made of compact hard bone, and thickest in the middle where forces are greatest. Towards the ends of the shaft the marrow cavity tends to be wider and filled with trabecular bone, arranged along lines of force which has a skeletal function in its own right and supports the marrow.

Is one of the two widened ends of a long bone?

They are characterized by a shaft and two widened ends known as epiphyses. The shaft is composed of dense, strong compact bone, with a central hollow that is filled with fatty yellow bone marrow.

Which bone is the longest and strongest bone of the human body?

The femur
The femur is the strongest bone in the body, and it is the longest bone in the human body.

Is the type of connective tissue that forms a cap on the ends of long bones?

hyaline cartilage plate
epiphyseal plate: A hyaline cartilage plate in the metaphysis, located at each end of a long bone where growth occurs in children and adolescents.

What cushions the ends of bones at their joints?

Cartilage is a type of firm, thick, slippery tissue that coats the ends of bones where they meet with other bones to form a joint. Cartilage acts as a protective cushion between bones.

What is an advantage of having hollow bones?

Hollow bones are also called pneumatized bones, meaning they’re filled with space for air. It is thought that this structure helps with oxygen intake during flight. Air sacs are attached to the hollow areas in a bird’s bones. Essentially, their lungs extend throughout their bones.

What is the strong connective tissue that holds the bones together in movable joint?

Ligaments
Ligaments: Bands of strong connective tissue called ligaments hold bones together.

What makes up the bulbous ends of a long bone?

Bulbous ENDS of a long bone. Made of SPONGY bone. Contains many spaces and is filled with RED bone marrow Part of connecting epiphysis to diaphysis. Made of CARTILAGE in developing or growing of bones. THIN layer of smooth, slippery HYALINE cartilage covering epiphysis. Reduces FRICTION between bones at moveable joints

What makes up the shaft of a bone?

Shaft of the bone. Made of COMPACT bone. Hollow cylinder (STRONG but LIGHT-WEIGHT) and is filled with YELLOW bone marrow Bulbous ENDS of a long bone. Made of SPONGY bone. Contains many spaces and is filled with RED bone marrow Part of connecting epiphysis to diaphysis. Made of CARTILAGE in developing or growing of bones.

When does the epiphyseal plate become an endosteum?

When the bone stops growing in early adulthood (approximately 18–21 years), the epiphyseal plate becomes an epiphyseal line seen in the figure. Lining the inside of the bone adjacent to the medullary cavity is a layer of bone cells called the endosteum (endo- = “inside”; osteo- = “bone”).

Which is part of the bone filled with red bone marrow?

The wider section at each end of the bone is called the epiphysis (plural = epiphyses), which is filled internally with spongy bone, another type of osseous tissue. Red bone marrow fills the spaces between the spongy bone in some long bones.