14. We all breathe air that contains oxygen required for respiration. Breathing consists of inhalation and
exhalation. It continues throughout the life of an individual. These processes take place with the
help of muscular diaphragm and the rib cage. The diaphragm is a muscular partition which separates
the chest cavity from the lower abdominal cavity. The number of times a person breathes per minute
is termed as the breathing rate. An adult normally breathes from 14-20 times per minute while a
new born baby has a rate of about 40 breaths per minute.
Answer the following questions.
a.) Define
1. Inhalation
2. Exhalation
b.) Name the muscular partition which separates the chest cavity from the lower abdominal cavity.
c.) What is the normal breathing rate of an adult?
Answers
A. 1. Inhalation is the process or act of breathing in, taking air and sometimes other substances into your lungs. ... They were taken to hospital suffering from smoke inhalation.
2. Exhalation (or expiration) is the flow of the breath out of an organism. In animals, it is the movement of air from the lungs out of the airways, to the external environment during breathing.
◆ During inhalation, the lungs expand with air and oxygen diffuses across the lung's surface, entering the bloodstream. During exhalation, the lungs expel air and lung volume decreases. ... During inhalation, the diaphragm is contracted which increases the volume of the lung cavity.
B.Diaphragm
Diaphragm, dome-shaped, muscular and membranous structure that separates the thoracic (chest) and abdominal cavities in mammals; it is the principal muscle of respiration.
C. Normal respiration rates for an adult person at rest range from 14 to 20 breaths per minute.