In adults, these bones are completely fused and their bodies form the cavity for the articulation with the femur, the acetabulum (8). The acetabulum is a deep cotyloid cavity in which all three pelvic bones contribute. It is composed of the body of ilium craniolaterally, the body of ischium caudolaterally and the body of pubis medially. The acetabulum is reciprocal to the head of femur, with which it forms the spheroidal hip joint. The acetabular cavity consists of the peripheral articular lunate surface and the non-articular acetabular fossa in the center.
Foot Bones Total 26 bones locate in three main portions of our foot: Forefoot, Mid-foot, and Hind-foot. It separates into three parts; tarsals, meta-tarsals, and Phalanges. https://en.wikipedia.org/wiki/File:Calcaneus_animation01.gif Tarsal Bones Seven tarsal bones locate in two sections (hind-foot, and mid-foot) of our foot. Where, hind-foot contains two tarsal bones named talus & calcaneus; and mid-foot contains five meta-tarsal bones. [The following two are hind-foot bones]
The nasal septum bisects the nasal cavity and comprises three portions: the bony perpendicular plate of the ethmoid (superoanterior) and the vomer (posterior and anteroinferior), a cartilaginous anterior triangle, and an inferior membranous columella that divides the nares anteriorly. Laterally, the nasal wall has three or more horizontal ridges termed turbinates, with a corresponding meatus below each (Figure 1.4). During the sixth week of embryologic development, before cartilage forms in the walls of the primitive nasal cavities, linear outgrowths of the lining epithelium occur on the sides and roof of each nasal side. Each outgrowing gutter becomes a meatus, whereas the ridges left behind form the turbinates.8,16 The inferior turbinate is the largest, arising from the medial wall of the maxillary sinus. The smaller and more posterior middle, superior, and supreme (if present) turbinates are outcroppings of the ethmoid bone.
Thoracic kyphosis (20-400), 3. Lumbar lordosis (30-500) and 4. Sacral kyphosis (not more than 400). ANATOMICAL PLANES: Coronal or frontal plane: It is a vertical imaginary line which divides the vertebral bodies into the front and back sections. The coronal plane of the spine delineates the scoliosis of spine.
The structure of intertebral disc is complex. Nucleus pulposus has a well organized matrix which is laid down by relatively few cells. Nucleus pulposus is a gelatinous structure present in the centre and is contained in the periphery by annulus which is collagenous and cartilaginous, and two cartilaginous endplates cephalad and caudad. Collagen fibers from annulus continue and attach to the surrounding tissues, tying into the vertebral body along its rim, cartilaginous endplates superiorly and inferiorly and anterior and posterior longitudinal ligaments. Bony endplate and cartilaginous endplates were connected by calcified cartilage.
The capsule of the elbow joint and the annular ligament stabilize the bones proximally. Distally, the bones are connected by a wrist capsule, radio-ulnar stabilizing ligaments (dorsal and volar) and a fibrocartilage articular disk (triangular fibrocartilage compex, TFCC) (). There is an interosseus membrane
The frontal sinus is therefor able to communicate with, and drain its contents into the ostiomeatal complex because of the connection between its frontonasal duct (recess) and the ethmoidal infundibulum. The uncinate process, which forms the anterior and medial limitation of the hiatus semilunaris and the ethmoidal infundibulum (respectively), is a thin, crescent shaped, bony leaflet that emerges from the ethmoidal labrynth
Hind brain (Rhombincephalan) the hind brain contain the brain stem and the medulla oblongata (Myelencephalon) form by the anterior thickening of basal plate and posterior alar plate separated by sulcus in the fourth ventricle. The hind brain continues to form the spinal cord. As like cerebrum, cerebellum has fissured mass in the posterior cranial fossa attached with brain stem by three pairs of peduncles. From the base of the brain stem the 12 pairs of cranial nerves are arising. The motor nuclei of the IX, X, XI and XII cranial nerves line in the fourth ventricle is formed by the basal plate neurons.
The skull is a bony structure that forms the head of the skeleton in most vertebrates. It supports the structures of the face and provides a protective cavity for the brain. The skull is composed of two parts, namely the cranium and the mandible. The skull contains the brain, and multiple sensory structures such as the eyes, ears, nose, and mouth. In the human these sensory structures are part of the
Your brain and your spinal cord are apart of this and that also happens to be the definition of the system. With your brain, there are three sections of it. You have the hindbrain which is the part of the brain that contains the medulla, pons, and cerebellum and it is responsible for keeping our body operating. The next section is the midbrain and it is the connection between the hindbrain and forebrain. It is the center for the eyes and ears and reticular formation is the main key here.