Skeletal System

the fundamental structural unit of compact bone, consisting of concentric layers of bone tissue surrounding a central canal that contains blood vessels and nerves.

The remnants of old osteons located between complete osteons.

Circular, ring-like layers that make up osteon, the main building block of compact bone.

narrow, cerebrospinal fluid-filled channel that runs through the spinal cord, playing a crucial role in the circulation of cerebrospinal fluid (CSF) and maintaining the health of the central nervous system.

star-shaped bone cells embedded in the mineralized matrix, residing in lacunae and connected through canaliculi to form a communication network.

are small cavities within bone or cartilage that house cells such as osteocytes in bone and chondrocytes in cartilage.

tiny channels in bone tissue that connect bone cells, allowing them to communicate and share nutrients, which is essential for bone health.

small, beam-like structures that form a supportive, lattice-like network within certain tissues, especially spongy bone.

a dense, fibrous membrane covering most bones, composed of an outer fibrous layer and an inner cellular layer, essential for bone growth, repair, and sensory perception.

are paired air-filled cavities located in the frontal bone above the eyes, triangle in shape.

curved bony ridges on the parietal bone of the skull.

large, oval-shaped opening located at the base of the skull, specifically in the occipital bone.

oval-shaped structures located at the base of the skull, in occipital bone surrounding the foramen magnum and it's what connects the first vertebra to the skull.

is a bony ridge on the back of your skull, specifically on the occipital bone.

Located on the mid-line of the occipital bone. In the middle of the superior nuchal line.

name for the passageway that extends from the outer ear to the eardrum within the temporal bone of the skull.

The bony nub or projection of the temporal bone, towards the bottom parallel to mandible.

Pointy bony projection from temporal bone that extends downward.

small, round opening located between the styloid and mastoid processes of the temporal bone

In temporal bone, in front of external acoustic meatus (earn canal), next to mandible in a C shape.

located in the temporal bone, maxilla, forms of the zygomatic arch (cheekbone) and part of eye socket.

Section of temporal bone that sits at base of the skull, between sphenoid and occipital bones, near the ears.

Located in center of petrous part of the temporal bone.

paired air-filled cavity located in the body of the sphenoid bone, deep within the skull behind the upper nasal cavity.

two large, curved, wing‑shaped extensions on either side of the sphenoid bone

Two thin, triangle plates of sphenoid bone in between the greater wings.

In front of temporal and below frontal bone.

A saddle shaped depression located in sphenoid bone, housing the pituitary gland.

Large, triangular shaped opening located at the apex of the orbit, between the greater and lesser wings of the sphenoid bone.

A funnel-shaped canal located in the lesser wing of the sphenoid bone. Lies medial to the superior orbital fissure.

located in the anteromedial part of the greater wing of the sphenoid bone, posterior to the medial end of the superior orbital fissure and inferior to it at the base of the skull.

oval-shaped opening in the greater wing of the sphenoid bone, posterolateral to the foramen rotundum and anteromedial to the foramen spinosum.

small, oval opening located in the greater wing of the sphenoid bone at the base of the skull. It is positioned posterolateral to the foramen ovale.

a thin, vertical bony structure that forms the upper part of the nasal septum, dividing the nasal cavity into two chambers.

part of the ethmoid bone, located in the anterior cranial fossa at the roof of the nasal cavity, between the eyes, and beneath the frontal bone

located in the cribriform plate of the skull, specifically in the two depressions lateral to the crista galli.

a thin, wedge-shaped bony structure that extends upward from the cribriform plate of the ethmoid bone

a small, curved bony projection from the ethmoid bone that forms the roof of the superior nasal meatus

curved bony plates projecting from the ethmoid bone into the nasal cavity.

a small, paired bone forming the bridge of the nose and protecting the nasal cavity.

a medial projection of the maxilla that forms the anterior three-fourths of the hard palate and separates the oral and nasal cavities.

pyramid-shaped cavity within the maxilla, situated beneath the orbit and lateral to the nasal cavity

the part of the jawbone that contains the tooth sockets, supporting and anchoring the teeth through the periodontal ligament.

a bony projection on the zygomatic bone that extends posteriorly to articulate with the zygomatic process of the temporal bone, forming the anterior portion of the zygomatic arch.