Answer:
78.09% nitrogen
20.95%oxygen
0.03%carbon dioxide
0.93%other gases
this is the composition of air
it is essential for respiration
Explanation:
if it helps then mark as brainliest✌️✌️
Answer:
The skull.
Explanation:
The cerebrospinal fluid is a clear fluid that serves as a nutrient delivey system for the brain, it also removes waste and acts as a cushion surrounding the brain and spinal cord. <em>Its leakage from the nose usually happens when there is a fistula between the dura and the skull base after a trauma.</em> This kind of fractures can lead to meningitis and surgery is needed.
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Carcinogens are found within cigerattes. Carcinogen refers to any subctance or agent that tends to produce a cancer.
Answer:
206 bones
and babies have 300 bones which then fuse together as they grow older to the 206
Explanation:
