Answer:
Emphysema may be defined as the medical condition that causes shortness of breath and creates problem in the normal breathing process. Smoking is the common cause of emphysema.
The lung structure especially alveoli and the small tissue that surround the airway are destroyed in the emphysema. Due to this reason, the bronchial tissue are also damaged and not supported by the alveoli. This causes the blockage of the airflow.
Exoskeleton and Endoskeleton
Multicellular organisms e.g. man meet their needs through use of specialized systems that they have in their bodies. Examples of such include:
1. cardiovascular system composed of heart, veins and arteries which facilitate transport of nutrients to all parts of the body .
2. Skeletal system composed of bones, joints, ligaments and cartilage whose function is support and protection of the body. <span>
3. Digestive system composed of mouth, esophagus, stomach , small and large intestines whose function is breakdown of food and absorption of nutrients.</span>
Training <span>is the process of preparing a person to perform strenuous work and to recover from that work as quickly as possible.</span>
B.)explore thoughts and feelings
F.)develop new skills and knowledge