- Have one way valves called venous valves to prevent back flow caused by gravity
- closely interact with tissues
- Have 3 layers ~ endothelium, smooth tissue, connective tissue
- Have smooth muscular walls
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Other questions in this quiz
2. What percentage of nitrogen is in inhaled air?
- 17 %
3. Tidal volume is....
- the maximum volume of air you can breath out after breathing in as much as you can
- how many breaths you take per minute
- the amount you breath in and out in one normal breath
- the volume of air you breath in one minute
4. Intercostal muscles.....
- Are tiny air sacks of which there are millions in the lungs.
- Are found between the ribs contracting and relaxing in the breathing process
- Is a sheet of muscle dividing the chest cavity and the abdominal cavity
- Is where gaseous exchange takes place
5. What is the muscles between the two chambers called?
- Vena cava
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