calcaneus

The capitate bone (os capitatum; os magnum) is a bone in the human hand. The capitate bone is the largest of the carpal bones, and occupies the center of the wrist. It presents, above, a rounded portion or head, which is received into the concavity formed by the navicular and lunate; a constricted portion or neck; and below this, the body. The superior surface is round, smooth, and articulates with the lunate bone. The inferior surface is divided by two ridges into three facets, for articulation with the second, third, and fourth metacarpal bones, that for the third being the largest.< ...

Including:

• Capitate bone - Articulations

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In tetrapods, the carpus is the cluster of bones in the hand between the radius and ulna and the metacarpus. The bones of the carpus do not belong to individual fingers, whereas those of the metacarpus do. The joint between the radius and ulna and the carpus is called the wrist. The corresponding part of the foot is the tarsus. The skeleton of the hand [Figs. 1, 2] is subdivided into three segments: the carpus or wrist bones; the metacarpus or bones of the palm; and the phalanges or bones of the d ...

Including:

• Carpus - The Carpus Ossa Carpi
• Carpus - Common Characteristics of the Carpal Bones

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The zygomatic bone (also known as the zygoma; Os Zygomaticum; Malar Bone) is a paired bone of the human skull. It articulates with the maxilla, the temporal bone, the sphenoid bone and the frontal bone. It forms part of the orbit and is commonly referred to as the cheekbone. It is situated at the upper and lateral part of the face: it forms the prominence of the cheek, part of the lateral wall and floor of the orbit, and parts of the temporal and infratemporal fossae [Fig. 1]. It presents a malar and a temporal surface; ...

Including:

• Zygomatic bone - Surfaces
• Zygomatic bone - Processes
• Zygomatic bone - Borders
• Zygomatic bone - Ossification
• Zygomatic bone - Articulations

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The cuboid bone is one of seven Tarsal bones. Distally, the Cuboid articulates with the fourth and fifth metatarsals, forming the fourth and fifth tarsometatarsal joints. Proximally, it articulates with the calcaneus, forming the calcaneocuboid joint. The medial surface of the bone articulates with both the lateral cuneiform bone and the navicular bone. The inferior surface has a groove on its distal th ...

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The fibula or calf bone is a bone placed on the lateral side of the tibia, with which it is connected above and below. It is the smaller of the two bones, and, in proportion to its length, the most slender of all the long bones. Its upper extremity is small, placed toward the back of the head of the tibia, below the level of the knee-joint, and excluded from the formation of this joint. Its lower extremity inclines a little forward, so as to be on a plane anterior to that of the upper end; it projects below the tibia, and forms ...

Including:

• Fibula - The Upper Extremity or Head
• Fibula - The Body or Shaft
• Fibula - Borders
• Fibula - Surfaces
• Fibula - The Lower Extremity or Lateral Malleolus
• Fibula - Ossification

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Sternum or breastbone is a long, flat bone located in the center of the thorax (chest). It connects to the rib bones via cartilage, forming the rib cage with them, and thus helps to protect the lungs and heart from physical trauma. The sternum is usually cut open (a sternotomy) to gain access to the thoracic contents when performing cardiothoracic surgery. Sternum - Overview. The sternum (Figs. 1 to 3) is an elongated, flattened bone, forming the middle portion of the anterior wall of the thor ...

Including:

• Sternum - Overview
• Sternum - Manubrium
• Sternum - Surfaces
• Sternum - Borders
• Sternum - Body
• Sternum - Surfaces
• Sternum - Borders
• Sternum - Xiphoid Process
• Sternum - Surfaces
• Sternum - Structure
• Sternum - Ossification
• Sternum - Articulations
• Sternum - Fractures of the Sternum

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The Achilles' tendon or heel (tendo Achillis) or the calcaneal tendon (tendo calcaneus) is a tendon of the posterior leg. It serves to attach the gastrocnemius (calf) and soleus muscles to the calcaneus (heel) bone. Achilles' heel is also a common expression for the single vulnerable spot in something or someone (in reference to the Achilles story from Greek Mythology). Achilles' tendon - Anatomy. In humans it passes behind the ankle. It is the thickest and stronges ...

Including:

• Achilles' tendon - Anatomy
• Achilles' tendon - Nomenclature
• Achilles' tendon - Achilles' heel
• Achilles' tendon - Achilles' tendon
• Achilles' tendon - Role in disease
• Achilles' tendon - Treatment of Achilles' tendon damage

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In anatomy, the ankle, or ancle (a word common, in various forms, to Teutonic languages, probably connected in origin with the Latin angulus, or Greek αγκυλος, bent), is the part of the lower limb that is located between the foot and the leg, and is actually comprised of two separate joints: the talocrural joint (or "true" ankle joint) and the subtalar joint. The talocrural joint, is a synovial joint that connects the distal ends of the tibia and fibula with the proximal end of the talus and is respon ...

Including:

• Ankle - Fractures

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There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. They are located between the navicular bone and the first, second and third metatarsal bones and are medial to the cuboid bone. The first cuneiform (a.k.a. os cuneiform primum / medial cuneiform) is the largest of the cuneiforms. It is situated at the medial side of the foot, anterior to the navicular and posterior to the base of the first metatarsal. It articulates with four bones: the navi ...

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The vomer bone is one of the unpaired facial bones of the skull. It is located in the midsagittal line, and touches the sphenoid, the ethmoid, the left and right palatine bones, and the left and right maxillary bones. The vomeronasal organ, also called Jacobson's organ, is a chemoreceptor organ named for its closeness to the vomer and nasal bones, and is particularly developed in animals such as cats (who adopt a characteristic pose called the Flehmen reaction or flehming when making use of it), and is thought to have ...

Including:

• Vomer bone - Ossification
• Vomer bone - Articulations

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The ulna (Elbow Bone) [Figs. 1, 2] is a long bone, prismatic in form, placed at the medial side of the forearm, parallel with the radius. Ulna - Articulations. The ulna articulates with: the humerus, at the elbow as a hinge joint. the radius, near the elbow as a pivot joint, this allows the radius to cross over the ulna in pronation. the distal radius, where it fits into the ulna notch.

('corpus radii') The body is prismoid in form, narrower above than below, and slightly curved, so as to be convex lateralward. It presents three borders and three surfaces. Radius bone - Borders. The volar border (margo volaris; anterior border) extends from the lower part of the tuberosity above to the anterior part of the base of the styloid process below, and separates the volar from the lateral surface. Its upper third is prominent, and from its oblique direction has received the n ...

See also:

Radius bone, Radius bone - The Upper Extremity, Radius bone - The Body or Shaft, Radius bone - Borders, Radius bone - Surface, Radius bone - The Lower Extremity, Radius bone - Structure, Radius bone - Ossification

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The scaphoid is the largest bone of the proximal row. It is situated at the radial side of the carpus, its long axis being from above downward, lateralward, and forward. The superior surface is convex, smooth, of triangular shape, and articulates with the lower end of the radius. The inferior surface, directed downward, lateralward, and backward, is also smooth, convex, and triangular, and is divided by a slight ridge into two parts, the lateral articulating with the greater ...

See also:

Scaphoid bone, Scaphoid bone - Overview of anatomy, Scaphoid bone - Articulations

Read more here: » Scaphoid bone: Encyclopedia II - Scaphoid bone - Overview of anatomy

Scapula - Costal. The costal or ventral surface [Fig. 1] presents a broad concavity, the subscapular fossa. The medial two-thirds of the fossa are marked by several oblique ridges, which run lateralward and upward. The ridges give attachment to the tendinous insertions, and the surfaces between them to the fleshy fibers, of the Subscapularis. The lateral third of the fossa is smooth and c ...

See also:

Scapula, Scapula - Muscles, Scapula - Surfaces, Scapula - Costal, Scapula - Dorsal, Scapula - The Spine 'spina scapulæ', Scapula - The Acromion, Scapula - Borders, Scapula - Angles, Scapula - The Coracoid Process 'processus coracoideus', Scapula - Structure, Scapula - Ossification

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The lacrimal articulates with four bones: two of the cranium, the frontal and ethmoid, and two of the face, the maxilla and the inferior nasal concha. THORAX: sternum | rib SKULL: cranial bones (occipital | parietal | frontal | temporal | sphenoid | ethmoid) facial bones (nasal | maxilla | lacrimal | zygomatic | palatine | inferior nasal conchae | vomer | mandible | hyoid) UPPER EXTREMITY: clavicle | ...

See also:

Lacrimal bone, Lacrimal bone - Surfaces, Lacrimal bone - Borders, Lacrimal bone - Ossification, Lacrimal bone - Articulations

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Palatine bone - The pyramidal process or tuberosity. The pyramidal process (processus pyramidalis) projects backward and lateralward from the junction of the horizontal and vertical parts, and is received into the angular interval between the lower extremities of the pterygoid plates. On its posterior surface is a smooth, grooved, triangular area, limited on either side by a rough articular furrow. The furrows articulate with the pterygoid plates, while the grooved intermediate area completes the lower part of the pterygoid fossa and gives origin to ...

See also:

Palatine bone, Palatine bone - The horizontal part, Palatine bone - Surfaces, Palatine bone - Borders, Palatine bone - The vertical part, Palatine bone - Processes, Palatine bone - The pyramidal process or tuberosity, Palatine bone - The orbital process, Palatine bone - The sphenoidal process, Palatine bone - Ossification, Palatine bone - Articulations

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The navicular bone (also called the navicular or scaphoid) is one of the tarsal bones, found in the foot. Its name derives from the bone's resemblance to a small boat, caused by the strongly concave proximal articular surface. It is located on the medial side of the foot, and articulates proximally with the talus, distally with the three cuneiform bones, and occasionally laterally with the cuboid. The term navicular bone or hand navicular bone is sometimes used to describe the scap ...

See also:

Navicular bone, Navicular bone - Human anatomy, Navicular bone - Horse anatomy

Read more here: » Navicular bone: Encyclopedia II - Navicular bone - Human anatomy

The squama (squama occipitalis), situated above and behind the foramen magnum, is curved from above downward and from side to side. Occipital bone - Surfaces. The external surface is convex and presents midway between the summit of the bone and the foramen magnum a prominence, the external occipital protuberance. Extending lateralward from this on either side are two curved lines, one a little above the other. The upper, often faintly marked, is named the highest ...

See also:

Occipital bone, Occipital bone - The squama, Occipital bone - Surfaces, Occipital bone - Lateral parts, Occipital bone - Basilar part, Occipital bone - Surfaces, Occipital bone - Foramen magnum, Occipital bone - Angles, Occipital bone - Borders, Occipital bone - Structure, Occipital bone - Ossification, Occipital bone - Articulations

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The body (corpus sphenoidale), more or less cubical in shape, is hollowed out in its interior to form two large cavities, the sphenoidal air sinuses, which are separated from each other by a septum. Sphenoid bone - Surfaces. The superior surface of the body [Fig. 1] presents in front a prominent spine, the ethmoidal spine, for articulation with the cribriform plate of the ethmoid bone; behind this is a smooth surface slightly raised in the middle line, and grooved on either side for the olfac ...

See also:

Sphenoid bone, Sphenoid bone - Body, Sphenoid bone - Surfaces, Sphenoid bone - The great wings, Sphenoid bone - Surfaces, Sphenoid bone - Margin, Sphenoid bone - The small wings, Sphenoid bone - Surfaces, Sphenoid bone - Borders, Sphenoid bone - Pterygoid processes, Sphenoid bone - Lateral pterygoid plate, Sphenoid bone - Medial pterygoid plate, Sphenoid bone - The sphenoidal conchæ, Sphenoid bone - Ossification, Sphenoid bone - Presphenoid, Sphenoid bone - Postsphenoid, Sphenoid bone - Intrinsic ligaments of the sphenoid

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Temporal bone - The squama. The squama (squama temporalis) forms the anterior and upper part of the bone, and is scale-like, thin, and translucent. Its outer surface [Fig. 1] is smooth and convex; it affords attachment to the temporalis muscle, and forms part of the temporal fossa; on its hinder part is a vertical groove for the middle temporal artery. A curved line, the temporal line, or supramastoid crest, runs backward and upward across its posterior part; it serves f ...

See also:

Temporal bone, Temporal bone - The five parts, Temporal bone - The squama, Temporal bone - Mastoid portion, Temporal bone - Petrous portion, Temporal bone - Tympanic part, Temporal bone - Styloid process, Temporal bone - Ossification, Temporal bone - Articulations

Read more here: » Temporal bone: Encyclopedia II - Temporal bone - The five parts