medical

Skeleton

The skeleton is the body part that forms the supporting structure of an organism. It can also be seen as the bony frame of the body which provides support, shape and protection and protection to the soft tissues and delicate organs.

Your skeleton has 206 bones, However, when you were a child you had as many as 350 as some of the bones fuse together as you grow, more than half of your 206 bones are found in your hands and feet. The largest bone in your body is your femur (thigh bone). The femur is connected to the tibia and fibula ( shin bones ) and the pelvis. Your humerus or as some people say your funny bone. is connected to the radius and the ulna ( forearm bones ). Your shoulder blade is called the scapula. and your collar bone is known as the clavicle. Your ribs are joined to your sternum ( breast bone ). The bones in your fingers and toes are called phalanges. Your head contains two major bones. The cranium ( skull ) and the mandible ( jaw ). The smallest bones of the human body are found in your ear - the hammer, anvil, and stirrup.


x-rays

X-rays are used to produce images of bones to check for damage, such as fractures. X-rays mostly pass through the skin and soft tissue, but they do not easily pass through bone.


Muscle

Muscle works by making themselves shorter, We say they contract, and the process is called contraction.
Muscles are attached to bone by strong tendons. When muscle contracts, it pulls on the bone, and the bone can movie if its part of a joint.

An example of antagonistic muscles: The elbow joint lets out the forearm move up or down. It is controlled by two muscles, the bicep and the front of the upper arm, and the triceps on the back of the upper arm. The biceps and the triceps are antagonistic muscles.


Joints

If two bones move against each other, they would eventually wear away. This can happen in people who have a disease called arthritis. To stop this happening, the ends of the bones in a joint are covered with a tough,
a smooth substance called cartilage.
Cartilafe reduces friction and acts as a shock absorber. It is kept slipper and lubricated by synovial fluids produced by the synovial membrane.
Tough ligaments join the two bones around the joints and stop it from coming apart.