Answer:
When entering, oxygen is high and carbon dioxide is being produced, when exiting carbon dioxide is being exhaled into the air
Explanation:
Answer:
viruses are at the borderline of living and non-living organinsms outside the body of living host they are non-active and they cannot grow without their host
Explanation:
I'm pretty sure it's a cell membrane
The right answer is: Bleeding oesophageal varices
Bleeding oesophageal varices occur when swollen veins (varicose veins) of the lower esophagus rupture and bleed.
Oesophageal varices may leak blood and eventually rupture. This can lead to serious bleeding and life-threatening complications, including death. When that happens, it's a medical emergency.
