Osteopetrosis is a rare, genetic disease that causes extremely dense and brittle bones. This is because individuals affected with osteopetrosis do not have normal osteoclasts, which bones need to work correctly. Healthy bones require properly functioning osteoblasts and osteoclasts. Osteoblasts are responsible for making new bones and osteoclasts are bone cells that are responsible for bone resorption, which is the breaking down of bones and providing space for new bone marrow to grow. An individual
resembles the periosteum of bones, provides blood vessels • Meningeal layer – dense, fibrous membrane • Falx cerebri – a large crescent shaped fold that is amid cerebral hemispheres • Tentorium cerebelli – horizontal large crescent crease attached to the internal surface of the occipital bone • Falx cerebelli - a fold that divides the cerebellar hemispheres and is attached internally to the occipital bone and is small and crescent shaped • Subdural space – an area between the dura mater and the arachnoid
For this report, the purpose was to test all of the cranial nerves to develop a better understanding of where they are located, what actions they possess, and how they carry out those actions into one’s daily life. There are 12 pairs of cranial nerves located in the human body. The first two pairs are attached and associated with the forebrain while the other ten pairs with the brain stem. Cranial nerves are exceedingly important when serving the head and neck along with cranial nerve X (Vagus) which
The five senses include sight, smell, touch, taste, and hearing. Sight is the power of seeing objects and people. To see we use our eyes, our eye is a sphere with a diameter of about 2.5 cm or 1 inch. Our eyes include the eyebrows, eyelids, conjunctiva, lacrimal apparatus, and extrinsic eye muscles. The eyelids are thin, skin covered folds supported by the connective tissue sheets called tarsal plates and are separated by the palpebral fissure and meet at medial and lateral angles of the eye. The
closing axis of the articulator. Although the majority of dentists tend to forget about the face bow immediately when they go to practice in their own clinics Face bow is also termed as a caliper like device which means it can measure both the internal and external dimensions. The face bow helps in transferring the esthetic and functional components from the patient to
The Ear and How It Hears The ear is one of the most important organs of the body. Not only does it serve to keep the body balanced, but most importantly it give us the ability to hear. When a noise is made it makes a sound wave. When the sound wave makes it to the ear it makes its way through the three sections of the ear. The ear is able to pick up sound waves and transfer them into nerve impulses that can be read by the brain. Background: A sound wave is pressure variations in air. Sound waves
the Diencephalon of the Brain Stem, the Cerebrum which is the largest part of the brain. Since the brain does not store oxygen, it needs a constant flow to prevent it shutting down. Blood flows to the brain mainly via, the internal Caroticl and Vertebral Arteries. The internal Tugular Veins return blood from the head to the heart. In adults, the brain is only two percent of the total body weight, but it consumes about two percent of the oxygen and glucose used at rest. When activity of neurons and