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What are spongy bones?

What are spongy bones?

Spongy (cancellous) bone is lighter and less dense than compact bone. Spongy bone consists of plates (trabeculae) and bars of bone adjacent to small, irregular cavities that contain red bone marrow. The canaliculi connect to the adjacent cavities, instead of a central haversian canal, to receive their blood supply.

What is a compact bone?

Compact bone, also called cortical bone, dense bone in which the bony matrix is solidly filled with organic ground substance and inorganic salts, leaving only tiny spaces (lacunae) that contain the osteocytes, or bone cells.

What is difference between compact and spongy bone?

Compact bone is dense and composed of osteons, while spongy bone is less dense and made up of trabeculae. Blood vessels and nerves enter the bone through the nutrient foramina to nourish and innervate bones.

What bones are spongy bone?

Spongy bone is usually located at the ends of the long bones (the epiphyses), with the harder compact bone surrounding it. It is also found inside the vertebrae, in the ribs, in the skull and in the bones of the joints. Spongy bone is softer and weaker than compact bone, but is also more flexible.

Why do we need both compact and spongy bone?

Bones are the primary skeletal structure that supports muscles and gives shape to the body. Spongy and compact bones are two basic structural bone types. They make up the long bones in the body….Spongy vs Compact Bones.

Spongy Bones Compact Bones
Bone-marrow cavity absent Bone-marrow cavity present in the centre

What is the outer layer of bone called?


What is the hardest part of a bone?

Compact bone is the heaviest, hardest type of bone. It needs to be very strong as it supports your body and muscles as you walk, run, and move throughout the day. About 80% of the bone in your body is compact. It makes up the outer layer of the bone and also helps protect the more fragile layers inside.

What are three kinds of movable joints?

Types of movable joints include the ball-and-socket joint, hinge joint, pivot joint, and gliding joint.

What does periosteal mean?

1 : situated around or produced external to bone. 2 : of, relating to, or involving the periosteum.

What is a periosteal reaction?

Periosteal reaction, also known as periostitis or periosteitis, is a nonspecific radiographic finding that indicates periosteal irritation. Periosteal reactions may be broadly characterized as benign or aggressive, or more specifically categorized by pattern.

What is periosteal stripping?

Periosteal stripping is the primary surgical technique for angular limb deformities of the lower radius and tibia. In addition, the hospitalization period is slightly shorter, making the overall cost of the operation less expensive.

What does axial skeleton mean?

The axial skeleton includes all the bones along the body’s long axis. The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage. The bones of the appendicular skeleton (the limbs and girdles) “append” to the axial skeleton.

What is a Axial?

1 : of, relating to, or having the characteristics of an axis. 2a : situated around, in the direction of, on, or along an axis. b : extending in a direction essentially perpendicular to the plane of a cyclic structure (as of cyclohexane) axial hydrogens — compare equatorial.

Which bone is found in the axial skeleton?

In the human skeleton, it consists of 80 bones and is composed of six parts; the skull (22 bones), also the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column….

Axial skeleton
TA98 A02.0.00.009
TA2 353
Anatomical terminology

Where is the axial skeleton?

The axial skeleton forms the central axis of the body and includes the bones of the skull, ossicles of the middle ear, hyoid bone of the throat, vertebral column, and the thoracic cage (ribcage) (Figure 1).

What are the 7 axial bones?

The axial skeleton is the part of the skeleton that consists of the bones of the head and trunk of a vertebrate. It consists of 80 bones and is composed of six parts: the skull bones, the ossicles of the middle ear, the hyoid bone, the rib cage, sternum and the vertebral column.

Which bones are not part of the axial skeleton?

The E) pelvic girdle is not part of the axial skeleton. This is part of the lower limbs, according to common practice.

What are the 22 bones of the skull?

A collection of 22 bones, the skull protects the all-important brain and supports the other soft tissues of the head….Cranial Bones

  • Frontal bone.
  • Two parietal bones.
  • Two temporal bones.
  • Occipital bone.
  • Ethmoid bone.
  • Sphenoid bone.

What are the 14 facial bone?

In the human skull, the facial skeleton consists of fourteen bones in the face:

  • Inferior turbinal (2)
  • Lacrimal bones (2)
  • Mandible.
  • Maxilla (2)
  • Nasal bones (2)
  • Palatine bones (2)
  • Vomer.
  • Zygomatic bones (2)

Which skull bone is movable?

The only bone in your skull that forms freely movable joints is your mandible, or jawbone.