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Oct 25, 2023 · Key facts about the main bones, joints and muscles of the body. Main bones. Axial skeleton: bones of the skull, ribs, vertebral column, sternum, sacrum, coccyx, hyoid bone and auditory ossicles. Appendicular skeleton: bones of the upper and lower limbs and the shoulder and pelvic girdles. Main joints.
Sep 5, 2019 · The Skeleton. Click to see Larger Image of Skeletal System. Our skeleton consists of a strong and solid internal framework of bones within our body. The bones of the skeleton give our body its shape, protect and support our organs, brain and spinal cord, and make it possible for us to move.
- Bones at A Glance
- Frontal Bone
- Parietal Bones
- Temporal Bones
- Occipital Bone
- Sphenoid Bone
- Ethmoid Bone
- Facial Bones at A Glance
- Mandible
- Maxilla
Frontal (1) Parietal (2) Temporal (2) Occipital (1) Sphenoid (1) Ethmoid (1) Total number of bones=8
This bone forms the forehead, the roof of the orbital cavity (eye socket), and the root of the nose. A newborn has a frontal bone that consists of two parts, separated by the frontal suture. However, the parts fuse to form a single bone, by the time a child is eight years old.
One bone from each side joins behind the frontal bone to form the sides and the roof of the cranium. There are 2 parietal bones, and each bone is roughly quadrilateral in shape.
There are 2 temporal bones in all, one on each side below the parietal bones. The temporal bones are located lateral to the temporal lobes of the brain, and each bone consists of five parts.
This is a single bone that is present at the back and lower part of the cranium, just behind the parietal and temporal bones. It has an oval aperture, known as the foramen magnum, through which the spinal cord enters the skull. Vertebral arteries, spinal nerves and ligaments that join the skull to the vertebrae, pass through this aperture.
This is a single bone that is situated at the base of the skull in front of the temporal bones and basilar part of the occipital bone. It’s shape resembles that of a butterfly, and it is one of the seven bones that form the orbital cavity or eye socket.
This is a light and spongy bone that is situated in the anterior part of the base of the cranium. It lies between the two orbits, at the roof of the nasal cavity, separating the brain from the nasal cavity. It is one of the seven bones that form the orbital cavity, and consists of three parts.
Mandible (1) Maxilla (2) Palatine bone (2) Zygomatic bone (2) Nasal bone (2) Lacrimal bone (2) Inferior nasal conchae (2) Vomer (1) Total number of bones=14
This is the lower jawbone, and is known as the inferior maxillary bone. It is U-shaped and is the largest and strongest bone of the face. The mandible of a newborn consists of two halves that fuse at the mental symphysis during the first year. Each half of the mandible has a horizontal body and a vertical ramus at the posterior end of the body. The...
The maxilla, or the upper jawbone, holds the teeth of the upper jaw, and forms the walls of the orbital cavity. It also contributes to the roof of the oral cavity, and the lateral walls and floor of the nasal cavity. The mandible is actually two bones that are fused along the palatal fissure. Failure of fusion of the two bones before birth, can lea...
Sep 27, 2024 · The skeletal system comprises 206 bones and has two main parts: the axial skeleton and the appendicular skeleton. The skeletal system includes your bones, ligaments that attach bone to bone, and cartilage that provides padding between your bones.
- Skull. The skull is composed of 22 bones that are fused together except for the mandible. These 21 fused bones are separate in children to allow the skull and brain to grow, but fuse to give added strength and protection as an adult.
- Hyoid and Auditory Ossicles. The hyoid is a small, U-shaped bone found just inferior to the mandible. The hyoid is the only bone in the body that does not form a joint with any other bone—it is a floating bone.
- Vertebrae. Twenty-six vertebrae form the vertebral column of the human body. They are named by region: Cervical (neck) - 7 vertebrae. Thoracic (chest) - 12 vertebrae.
- Ribs and Sternum. The sternum, or breastbone, is a thin, knife-shaped bone located along the midline of the anterior side of the thoracic region of the skeleton.
Oct 30, 2023 · They are usually classified into five types of bones that include the flat, long, short, irregular, and sesamoid bones. The human bones have a number of important functions in the body. Most importantly, they are responsible for somatic rigidity, structural outline, erect posture and movement (e.g. bipedal gait).
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Key points. The skeleton allows movement, provides support and protection for vital organs and makes blood cells. Skeletal muscles move the bones in the body. Skeletal and muscular systems. The...
