Batteries & Chargers. Name the bones that make up the walls of the orbit and identify the openings associated with the orbit. This cartilage also extends outward into the nose where it separates the right and left nostrils. The curved, inferior margin of the maxillary bone that forms the upper jaw and contains the upper teeth is the alveolar process of the maxilla (Figure 7.
Superior margin of the orbit. Smallest and most superiorly located of the nasal conchae; formed by the ethmoid bone. The large foramen magnum is located at the midline of the posterior fossa. The posterior cranial fossa is the deepest fossa.
Portion of skull enclosing the brain. The ethmoid bone also contributes to the formation of facial structures. Both the optic nerve and the ophthalmic artery pass through the optic canal which is centrally located on the sphenoid bone. Cheekbone; paired bones that contribute to the lateral orbit and anterior zygomatic arch. Sitting Room Furniture.
Arts, Crafts & Sewing. Coffee & Tea Making. Interactive Link Questions. Pets and Pet Supplies. Kites & Kitesurfing. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. Art-labeling activity external view of the skull base. Middle cranial fossa||. Symptoms associated with a hematoma may not be apparent immediately following the injury, but if untreated, blood accumulation will exert increasing pressure on the brain and can result in death within a few hours. The frontal bone is thickened just above each supraorbital margin, forming rounded brow ridges. Card Readers & USB Hubs. The squamous suture is located on the lateral skull. Extending from each lateral wall are the superior nasal concha and middle nasal concha, which are thin, curved projections (turbinates) that extend into the nasal cavity (Figure 7.
The superior nasal concha is located just lateral to the perpendicular plate, in the upper nasal cavity. Kim Bengochea, Regis University, Denver. The ethmoid bone also forms the lateral walls of the upper nasal cavity. Industrial & Business.
Facial (14): vomer, two inferior nasal conchae, two nasal, two maxillae, mandible, two palatine, two zygomatic, two lacrimal. Projecting inferiorly from this region is a large prominence, the mastoid process, which serves as a muscle attachment site. Sports Nutrition & Supplements. Oval-shaped process located at the top of the condylar process of the mandible. Art-labeling activity external view of the skull based. Also seen are the upper and lower jaws, with their respective teeth (Figure 7. All of the sinuses communicate with the nasal cavity (paranasal = "next to nasal cavity") and are lined with nasal mucosa. The upper margin of the anterior orbit is the supraorbital margin.
The rounded depression in the floor of the sella turcica is the hypophyseal (pituitary) fossa, which houses the pea-sized pituitary (hypophyseal) gland. Foramen rotundum—This rounded opening (rotundum = "round") is located in the floor of the middle cranial fossa, just inferior to the superior orbital fissure. Other Sporting Goods. Art-labeling activity external view of the skull is one. Coronoid process of the mandible. In the center of the middle cranial fossa it forms the pituitary fossa in which the pituitary gland sits. The largest opening in the skull is the foramen magnum. Located inside each petrous ridge are small cavities that house the structures of the middle and inner ears. Openings: superior orbital fissure, foramen rotundum, foramen ovale, carotid canal, foramen lacerum, foramen spinosum. This portion of the ethmoid bone consists of two parts, the crista galli and cribriform plates.
They also support the cartilages that form the lateral walls of the nose (see Figure 7. Sports, Fitness & Recreation. Inferior margin of anterior mandible that forms the chin. Secretarial Services. Computer & Telecom Networking. The 22nd bone is the mandible (lower jaw), which is the only moveable bone of the skull. Unpaired bone that forms the lower jaw bone; the only moveable bone of the skull. The unpaired bones are the vomer and mandible bones. Mastering A&P Chapter 7 -The Skeleton Art-labeling Activity: Figure 7.5a (2 of 3) Diagram. In the adult, the skull consists of 22 individual bones, 21 of which are immobile and united into a single unit. Web & Graphics Design. Elongated, free-standing arch on the lateral skull, formed anteriorly by the temporal process of the zygomatic bone and posteriorly by the zygomatic process of the temporal bone.
Advertising & Marketing. This bony region of the sphenoid bone is named for its resemblance to the horse saddles used by the Ottoman Turks, with a high back, called the dorsum sellae, and a tall front. Dinnerware & Serving Dishes. In the following, the most important structures are discussed ordered by their location in the three cranial fossae. Define the paranasal sinuses and identify the location of each. This is the point of exit for the cranial nerve that supplies the facial muscles. The ethmoid bone is a single, midline bone that forms the roof and lateral walls of the upper nasal cavity, the upper portion of the nasal septum, and contributes to the medial wall of the orbit (Figure 7. Paired, oval-shaped bony knobs located on the inferior skull, to either side of the foramen magnum. Oval-shaped opening in the floor of the middle cranial fossa. Internal acoustic meatus.
The sagittal suture extends posteriorly from the coronal suture at the intersection called bregma, running along the midline at the top of the skull in the sagittal plane of section (see Figure 7. Located just above the inferior concha is the middle nasal concha, which is part of the ethmoid bone. Supraorbital foramen. Upper border of mandibular body that contains the lower teeth. Learn everything about the bones of the skull with our articles, video tutorials, labeled diagrams, and quizzes. Electrical & Wiring. These muscles act to move the hyoid up/down or forward/back. These are bony plates that curve downward as they project into the space of the nasal cavity. The branching pattern of this artery forms readily visible grooves on the internal surface of the skull and these grooves can be traced back to their origin at the foramen spinosum. Petrous portion of the temporal bone that forms a large, triangular ridge in the floor of the cranial cavity, separating the middle and posterior cranial fossae; houses the middle and inner ear structures. Paired bones that form the base of the nose. They serve to reduce bone mass and thus lighten the skull, and they also add resonance to the voice.
The occipital region. Paired bones that form the lateral, inferior portions of the skull, with squamous, mastoid, and petrous portions. Other sets by this creator. Most foramina in which relevant nerves and blood vessels pass through are located at the base of the skull. These may result in bleeding inside the skull with subsequent injury to the brain. The rounded cranium surrounds and protects the brain and houses the middle and inner ear structures. Each of the paired zygomatic bones forms much of the lateral wall of the orbit and the lateral-inferior margins of the anterior orbital opening (see Figure 7. The maxilla also forms the larger anterior portion of the hard palate, which is completed by the smaller palatine bones that form the posterior portion of the hard palate. Compressors & Pumps. The hard palate is the bony plate that forms the roof of the mouth and floor of the nasal cavity, separating the oral and nasal cavities.