Chapter 8 (part 3)

The correct answer is mandible as it is the lower jawbone that forms the only freely movable joint in the skull with the temporal bones. The maxilla is the upper jawbone, the zygomatic bone is cheekbone, and the sphenoid bone is located at the base of the skull.

The body of a typical vertebra forms the rounded, central portion that faces anteriorly in the human vertebral column, providing support and weight-bearing capabilities.

The cervical vertebrae are the only vertebrae that articulate with the corresponding ribs, as they are the only vertebrae to form a joint with ribs. The thoracic vertebrae have facets for rib articulation, while the lumbar and sacral vertebrae do not.

The first seven pair of ribs are actually called true ribs, while the last five pairs are considered floating ribs.

The skull is composed of cranial bones which form the top, back, and sides of the skull to protect the brain, and facial bones which form the structure of the face.

The axial skeleton consists of 80 bones including the skull, vertebral column, and rib cage.

The cranium is made up of eight large bones, not four, twelve, or six. The correct answer is 'eight.'

The correct answer refers to the parietal bones and temporal bones, which are part of the cranium but are exceptions to being singular bones. The incorrect answers mention other bones that are not an exception to the cranium.

Parietals and temporals refer to bones in the skull that are single bones, while the incorrect answers consist of pairs of bones in the human body.

The hyoid bone is not considered a facial bone as it is a U-shaped bone in the neck that supports the tongue and serves as an attachment point for various neck muscles, while the maxilla, mandible, and zygomatic bones are all part of the facial structure.

The hyoid bone is not technically considered a facial bone, but is often included in discussions of facial anatomy due to its location in the neck and close association with the structures of the face.

The correct answer is mandible, as it is the only facial bone that does not join the maxillae directly. The zygomatic bones, nasal bones, and temporal bones all articulate with the maxillae in the facial structure.

The maxillae are the main or keystone bones of the face, forming the upper jaw and supporting the upper teeth. The mandible is the lower jaw bone, the zygomatic bones are cheekbones, and the frontal bones are part of the skull but not considered main facial bones.

The hyoid bone is a U-shaped bone in the neck that is above the larynx and does not articulate with any other bones in the body. The clavicle is the collarbone, the femur is the thigh bone, and the scapula is the shoulder blade, which are not located in the throat area above the larynx.

The hyoid bone is often compared to the shape of a horse, with its body and two pairs of projections called horns and cornua. The other options provided do not accurately describe the structure of the hyoid bone.

The correct answer is mandible because it is the only facial bone that does not join the maxillae.

The maxillae are two bones that form the upper jaw and central portion of the facial skeleton. They are considered the main, keystone bones of the face.

The hyoid bone is a U-shaped bone in the neck that supports the tongue and provides attachment for muscles of the neck and pharynx. It is located in the throat above the larynx.

The hyoid bone, shaped like a horse, features two pairs of projections known as 'horns' or 'cornua'. This unique bone does not articulate with any other bones in the body and plays a crucial role in supporting the tongue and serving as an attachment point for various neck muscles.

The correct answer includes bones of the skull that contain sinuses, while the incorrect answers mention bones of the lower body, upper body, and extremities which do not have sinuses.

The maxillary bone is the largest of the 4 bones that contain sinuses, known as the paranasal sinuses. The other options listed are also bones that contain sinuses, but they are not the largest among them.

The hyoid bone is a U-shaped bone in the neck that is not attached to any other bone. It serves as the point of attachment for many tongue and neck muscles, helping in speech and swallowing.

Fontanels are the soft spots on a baby's head where the skull bones have not yet fused together. Sutures are the areas where the skull bones meet and join. Craniosynostosis is a condition where these sutures close too early. Cephalic hematoma is a collection of blood between the skull and the periosteum.

Fontanels are the soft spots on a baby's head that allow for the fetal skull to be compressed slightly during birth and also allow for brain growth during late fetal life.

Fontanels are the spaces between the bones of an infant's skull that are not yet ossified. By the age of 20 to 22 months, these fontanels typically close as the bones fully develop and fuse together. The incorrect answers provide different time frames, but the correct age range for fontanel ossification is 20 to 22 months.