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Medical physics module semester 1

الكلية كلية طب حمورابي     القسم الكلية ذات القسم الواحد     المرحلة 1
أستاذ المادة نادية حسين صاحب طاهر       04/11/2018 17:49:30


Medical physics module semester 1

• After the end of this lecture, the student must know:

1- The different function of bones in the body.

2- Calcium homeostasis and the role of calcium in bone formation and strength.

3- Measurement of bone mineral.

BONES

Bone is of interest to medical physics and engineers. Perhaps this organ system of the body appeals most to physical scientists because engineering type problems dealing with static and dynamic leading forces that occur during standing, walking, running, and lifting

Functions of Bones

1- Support. Support function is most obvious in the legs.
2.Locomotion. Bone joint permit movement of one bone with respect to another.

3-Protection of various organs. The skull, which protects the brain and several of the most important sensory organs (eyes and ears).

4.Storage of chemical. The bone acts as a chemical bank for storing elements for future use the body.

5. Nourishment. The teeth are specialized
bones that can cut food.

6. Sound transmission. The smallest bones of the body are the ossicles in middle ear.
These three small bones act as lever and provide an impedance matching system for converting sound vibrations in air to sound vibrations in the fluid.


What is Bone Made of

Bone consists of two quite different materials plus water collagen, the major organic fraction, which is About 40% of the weight of solid bone and 60% of its volume, and (bone mineral).
inorganic component of bone, which is about 60%of the weight of the bone and 40% of its volume.

The large percentage of calcium in bone. Since calcium has a much heavier nucleus than most elements of the body, it absorbs X-rays much better than the surrounding soft tissue. This is the reason X-rays show bones so well.


المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .