what are the layers of bone?
611535
['Periosteum.', 'Cortical, or Hard Bone.', 'Cancellous, or Spongy Bone.', 'Bone Marrow.']
801534
OSTEOBLASTS are the cells that form new bone. They also come from the bone marrow and are related to structural cells. They have only one nucleus. Osteoblasts work in teams to build bone.
1455973
Bone TissueEdit The bones of the human skeleton are comprised of two basic kinds of osseous tissue which differ in texture. Compact Bone appears very smooth and homogeneous.
183912
Compact bone tissue is composed of osteons and forms the external layer of all bones. Spongy bone tissue is composed of trabeculae and forms the inner part of all bones. Four types of cells compose bony tissue: osteocytes, osteoclasts, osteoprogenitor cells, and osteoblasts.
711432
The bones of the body come in a variety of sizes and shapes. The four principal types of bones are long, short, flat and irregular.
1019669
What is the skeletal system? The skeletal system is your body's central framework. It consists of bones and connective tissue, including cartilage, tendons, and ligaments. It's also called the musculoskeletal system.
617696
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).
169820
Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal. The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line.
745779
Compact bone consists of cylindrical units called osteons. Each osteon contains concentric lamellae (layers) of hard, calcified matrix with osteocytes (bone cells) lodged in lacunae (spaces) between the lamellae.
858303
Bones are discrete organs made up of bone tissue, plus a few other things. The main misconception about bones then, is that they are made up of dead tissue. This is not true, they have cells, nerves, blood vessels and pain receptors.
1424780
The human's axial skeleton is composed of 80 bones and is the central core of the body. The primary divisions of the skeleton system are: Head, including the bones of the skull (cranium), face, auditory ossicles, and hyoid bone. Thorax, including the rib cage and sternum.
409952
Structure. The outer shell of the long bone is made of cortical bone also known as compact bone. This is covered by a membrane of connective tissue called the periosteum. Beneath the cortical bone layer is a layer of spongy cancellous bone.
183737
Skeletal system. The skeleton is the central structure of the body and is made up of bones, joints and cartilage. The skeleton provides the framework for muscles and gives the body its defined human shape.
66877
['Skull – including the jaw bone.', 'Spine – cervical, thoracic and lumbar vertebrae, sacrum and tailbone (coccyx)', 'Chest – ribs and breastbone (sternum)', 'Arms – shoulder blade (scapula), collar bone (clavicle), humerus, radius and ulna.', 'Hands – wrist bones (carpals), metacarpals and phalanges.', 'Pelvis – hip bones.']
800033
Cartilage and Bone are specialised forms of connective tissue. They are both made up of cells embedded in an extracellular matrix. It is the nature of the matrix that defines the properties of these connective tissues. Cartilage is thin, avascular, flexible and resistant to compressive forces.
12909
Bone contains an outer shell of dense, compact bone, whereas the inner region consists of thin, networks of bone called trabeculae. Three cells regulate the bone density and size. Osteoblast and osteolasts synthesize bone, and osteoclasts erode bone.
1020288
['Epidermis. The epidermis is the most superficial layer of the skin that covers almost the entire body surface. ... ', 'Dermis. The dermis is the deep layer of the skin found under the epidermis. ... ', 'Hypodermis. ... ', 'Hair. ... ', 'Nails. ... ', 'Sudoriferous Glands. ... ', 'Sebaceous Glands. ... ', 'Ceruminous Glands.']