sturctures air passes through to get to capillaries of lungs
Terms
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- The first structure air passes through in the respiratory tract
- the mouth or nasal caviety
- The second structure of the respiratoy tract
- pharynx
- the third structure of the respiratory tract
- larynx (voice box)
- the fourth structure of the RT
- trachea (windpipe)
- the fifth structure of the RT
- bronchi and bronchioles
- The last structure of the RT
- Alveoli (one cell thick)
- The structure of hemoglobin
-
- contains four polypeptide chains and four heme groups
- each heme group contains an iron atom - How does the exchange of oxgen and carbon dixiode occure
- oxygen and carbon dixoide exchange by passive diffusion
- In the lungs
-
oxygen exitse the alveoli to enter red blood cells in the lung capillaries
- blood returns to the heart then travels to other body cells
- carbon dixoide exists the lung capillarite to enter alveoli and is exhaled - how do the gasas exchange at tissue level
- oxygen departs from the tissue capillaries to enter body cell
- The brain parts which contain respiratory rate and depth
- -nerves connect the pons and the medulla in the brain stem to the muscles of the ribs and the diaphram
- What does smoking do to the respiratory system?
-
It errodes the cilia in the bronchi and the bronchi irreversibly narrows
- delicate alveolia are destroyed so it becomes harder to gain oxygen and release carbon dioxide (this is called permant emphasema) - what is the counter current flow mechanism
- a mechanism which allows fish to breath in water.
- How do birds absorb enough oxygen
- their air sacs allow fresh air to flow into the lungs on both inspiration and experation.
- insects breath
- thourgh the numerous tiny tracheas in thier skin, which branch to reach fluid around body cells
- Earth worms breath by
- absorbing oxygen through thier most body sufaces which diffuses into cells and the co2 exits back out through the skin