11美国心脏协会简介

But people may worry about getting sick from blowing into a stranger's mouth. Also, the training is easy to forget, especially during an emergency . And those without training may not do anything for fear that they will do something wrong. So in 2008, the American Heart Association simplified its guidelines. The group now calls forhands-only CPR for adults who suddenly collapse. Here is how it works:

CPR
Hands-only
CPR How to perform CPR (for professionals) CPR for babies
The Skeletal System

Your skeletal system is all of the bones in the body and the tissues such as tendons, ligaments and cartilage that connect them. Your teeth are also considered part of your skeletal system but they are not counted as bones. Your teeth are made of enamel and dentin. Enamel is the strongest substance in your body.

A person has collapsed unconscious on the ground.The victim has lost color in the face and does not appear to be breathing. These are signs of cardiac arrest. This is the time to begin CPR. Place your hands, one on top of the other, on the center of the chest. Push hard and fast. Aim for a rate of about one hundred compressions each minute. Chest compressions keep the blood flowing to the brain, heart and other organs.
The Skeletal System---functions

Your skeleton also helps protect your internal organs and fragile body tissues. The brain, eyes, heart, lungs and spinal cord are all protected by your skeleton. Your cranium (skull) protects your brain and eyes, the ribs பைடு நூலகம்rotect your heart and lungs and your vertebrae (spine, backbones) protect your spinal cord.

But the experts say you should still use traditional CPR with a combination of breaths and compressions on babies and children. Traditional CPR should also be used for adults found already unconscious and not breathing normally. And traditional CPR should be used for any victims of drowning or collapse from breathing problems. These are all examples where CPR with mouthto-mouth breathing may be more helpful that hands-only CPR. Because there are many of these cases, people should still learn CPR with mouth-to-mouth.
The Skeletal System

Babies have more than adults! At birth, you have about 300 bones. As you grow older, small bones join together to make big ones. Adults end up with about 206 bones.
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The Skeletal System---structure of a bone

A typical bone has an outer layer of hard or compact bone, which is very strong, dense and tough. Inside this is a layer of spongy bone, which is like honeycomb, lighter and slightly flexible. In the middle of some bones is jelly-like bone marrow, where new cells are constantly being produced for the blood. Calcium is an important mineral that bone cells need to stay strong so keep drinking that low-fat milk!
The Skeletal System---functions

Bones provide the structure for muscles to attach so that our bodies are able to move. Tendons are tough inelastic bands that hold or attach muscle to bone.
If a person's heart stops, would you know how to perform CPR? CPR, or cardiopulmonary resuscitation, can save a life and reduce the risk of brain damage from loss of oxygen. With traditional CPR, you give two breathes to force air into the lungs. Then you push hard on the chest thirty times. You repeat these two steps until the victim wakes up or medical helparrives.
Classification of bones



The human skeleton is divided into two distinct parts: The axial skeleton consists of bones that form the axis of the body and support and protect the organs of the head, neck, and trunk. The Skull The Sternum The Ribs The Vertebral Column The appendicular skeleton is composed of bones that anchor the appendages to the axial skeleton. The Upper Extremities The Lower Extremities The Shoulder Girdle The Pelvic Girdle
The Skeletal System--functions

The main job of the skeleton is to provide support for our body. Without your skeleton your body would collapse into a heap. Your skeleton is strong but light. Without bones you'd be just a puddle of skin and guts on the floor.