03/06 Flashcards
Lungs are located within the
Thoracic cavity
Heart is located between the lungs in the
Pericardial sac
How many lobes does the left lung have?
Two
How many lobes does the right lung have?
Three
The respiratory tract is an open body cavity, so it is lined with
Mucous membranes
Thoracic cavity is a closed body cavity, so it is lined with
Serous membranes
What is the serous membrane that surrounds the lungs?
Pleura
The Visceral Layer of the lung lies
Against the lung
The Parietal Layer of the lung lines
The body cavity
Serous membranes are
Double membranes with empty space in between, or the pleural cavity
Body cells need Oxygen for
Cellular respiration (to make ATP)
What are the four parts of respiration?
- Pulmonary Ventilation
- Alveolar Gas Exchange
- Gas Transport
- Systemic Gas Exchange
What happens during Pulmonary Ventilation?
Air containing O2 moves into lungs, whereas CO2 air leaves lungs
What are the two steps of Pulmonary Ventilation?
- Inspiration
2. Expiration
What happens during Alveolar Gas Exchange?
There is gas exchange at respiratory membrane in the alveoli
With what does diffusion happen with in Alveolar Gas Exchange?
In body cells, with O2 diffusing into and CO2 diffusing out
The Circulatory system kicks in during which step of respiration?
Gas Transport
Gas Transport involves
Blood being moved around the body
Systemic Gas Exchange is
Gas exchange at body tissues
What is Boyle’s Law?
PiVi = P2V2
Air moves down the pressure gradient from
High pressure to low pressure
When you breathe in, the volume of lungs
Increases
Diaphragm will contract when
You inspire
What happens when the diaphragm contracts?
- It will move down and extend ribs
- Increases volume of thoracic cavity
