The pubis, together with the
The pubis is a portion of the pelvis — a group of fused, irregular bones. Its superior and inferior rami extend posterolaterally from its small body, which is medially located.
Flat Bones Protect Internal Organs
There are flat bones in the skull (occipital, parietal, frontal, nasal, lacrimal, and vomer), the thoracic cage (sternum and ribs), and the pelvis (ilium, ischium, and pubis).
Modern anatomical reference texts classify the pubic symphysis either as a secondary cartilaginous (McMinn, 1994; Standring, 2008) or fibrocartilaginous (Rosse & Gaddum-Rosse, 1997) joint.
The body of pubic bone has three surfaces that include: anterior (external), posterior (internal) and medial (symphyseal) surfaces. The surfaces are confluent, except at the pubic crest (located anterosuperior part of body of pubic bone) which marks the transition from external to internal surfaces.
Flat bones are made up of a layer of spongy bone between two thin layers of compact bone. They have a flat shape, not rounded. Examples include the skull and rib bones. Flat bones have marrow, but they do not have a bone marrow cavity.
Irregular Bones
They are primarily spongy bone that is covered with a thin layer of compact bone. The vertebrae and some of the bones in the skull are irregular bones. All bones have surface markings and characteristics that make a specific bone unique.
The irregular bones are: the vertebrae, sacrum, coccyx, temporal, sphenoid, ethmoid, zygomatic, maxilla, mandible, palatine, inferior nasal concha, and hyoid.
The irregular bones are literally found all over the body including the bones of the spinal column called vertebrae. The sacrum and coccyx are also examples of irregular bones. The cranial bones, ethmoid and sphenoid, can be classified as irregular bones.
A sesamoid bone is a small round bone that is imbedded within a tendon, whose purpose is to reinforce and decrease stress on that tendon. You will mostly find sesamoid bones in the knee, thumb, and big toe1. Others in the hand and feet are much smaller.
Examples of flat bones are the sternum (breast bone), ribs, scapulae (shoulder blades), and the roof of the skull (Figure 1). Irregular bones are bones with complex shapes. These bones may have short, flat, notched, or ridged surfaces. Examples of irregular bones are the vertebrae, hip bones, and several skull bones.
Flat bones are thin, but are often curved, such as the ribs. Irregular bones such as those of the face have no characteristic shape. Sesamoid bones, such as the patellae, are small and round, and are located in tendons.
The flat bones are: the occipital, parietal, frontal, nasal, lacrimal, vomer, hip bone (coxal bone), sternum, ribs, and scapulae. These bones are composed of two thin layers of compact bone enclosing between them a variable quantity of cancellous bone, which is the location of red bone marrow.
Irregular Bones. Bones that are neither long, short, nor flat are considered irregular bones. The shapes of these bones provide very specific functions. The facial bones and the bones of the spinal column, the vertebrae, are all irregular bones.
Explanation: The scapula is the only bone listed that is a flat bone. The ulna is a long bone, the sphenoid is an irregular bone, and the patella is a sesamoid bone.
Parts of the pelvis are classified as a flat bone. The pelvis is made of three separate bones that fuse together as a person ages. These bones are the ilium, ischium, and pubis. Only the ilium is classified as a flat bone.
The outside surface is comprised of a thin layer of compact bone. Short bones are located in the hands and feet. The patella (kneecap) is also considered a short bone.
Irregular Bones.
They consist of cancellous tissue enclosed within a thin layer of compact bone. The irregular bones are: the vertebræ, sacrum, coccyx, temporal, sphenoid, ethmoid, zygomatic, maxilla, mandible, palatine, inferior nasal concha, and hyoid.
Your bones, pound for pound, are 4 times stronger than concrete. A muscle called the diaphragm controls the human breathing process. Bone is stronger than some steel. Bones make up only 14% of our weight.
Excess pressure on your forefoot can cause pain and inflammation in your metatarsals — the long bones in the front of your feet, just below your toes. Metatarsalgia (met-uh-tahr-SAL-juh) is a condition in which the ball of your foot becomes painful and inflamed.
Typically there are five sesamoid bones in each hand; two at the metacarpophalangeal (MCP) joint of the thumb, one at the interphalangeal (IP) joint of the thumb, one at the MCP joint of the index finger on the radial side, and one at the MCP joint of the little finger on the ulnar side.
Sesamoiditis causes pain at the ball of the foot, beneath the big toe joint. Sesamoid bones are embedded in a tendon, much like the kneecap, acting to increase the leverage of the tendons that control the big toe.
Medical conditions associated with cracking and popping toes include prior toe injuries, progressive stress fractures, osteoarthritis, and long-term complications of rheumatoid arthritis and gout.