Answer: Cro-Magnon were early modern humans, and looked the same as we do. Neanderthals had a larger mass, bigger muscles, an expanded ribcage with bigger lungs, a weak chin and a prominent brow ridge.
Answer: I once attended a meeting where a psychologist said that they thought females were more often depressed. The reasoning was along the lines that the stuff life throws at you (losing your job, your sweetheart leaves you for another) is roughly the same for everyone, but females must deal with a number of hormonal changes in addition (monthly period, pregnancy and the menopause later in life).
On the other hand, I have also seen research saying that for middle aged and older people, females seem to be happier, especially after a breakup or death of the spouse. The reason here was that females had more friends and were better at keeping on living, while the males tended to have nobody else and were more isolated.
Answer: Cannibalism is the act or practice of humans eating flesh of other humans. In zoology, the term "cannibalism" is extended to refer to any species consuming members of its own kind (see cannibalism (zoology)).
Answer: The gases in gas we exhale are mostly carbon dioxide and 4% to 5% less oxygen than was inhaled. Additionally, vapors and trace gases are present: 5% water vapor, several parts per million (ppm) of hydrogen & carbon monoxide, 1 ppm of ammonia and less than 1 ppm of acetone, methanol, ethanol and other volatile organic compounds.
Answer: When you breathe in, your diaphragm contracts and is pushed upwards. Your lungs expand and fill with air. The pressure within your chest cavity increases, and the body goes through the gas exchange process, providing red blood cells with oxygen. The carbon dioxide within red blood cells is then transferred into the lungs, and is exhaled along with traces of oxygen and other substances within the air. The diaphragm relaxes, lungs deflate, and pressure within the chest decreases.
How do humans breath?
With lungs!! how else? without lungs there would be no place for the air to go... duh
Answer: All cells require oxygen in order to survive. the brain especially dies when starved of O2. that is why when you are suffocated or drowned, you are starved of O2, therefore you expire. The only way to obtain O2 into the bloodstream is to breathe (inhale) it. By a number of processes, the O2 makes its way into the blood, oxygenating all the bodys cells, allowing them to grow & repair.
Answer: Because when you exercise you are working your body very hard and your muscles need oxygen to move and when you are exercising your muscles need more oxygen which results in you breathing more. Hope this helped. xxx your heart is pumping fast, your lungs need to keep up with the amount of oxygen it needs to put in the blood for say a 160BPM
Answer: Actually just by looking at the "respiration mechanism" we can understand the forces that can make it possible for us to breath .The most important foce is mechanical force which is done by the contraction and relaxation of the diaphragm (mainly) and the intercostal muscles.
Answer: Most moldy bread will harm people that eat it. Some mold will not make you sick. Some mold will make you sick. Some mold will make you extremely sick. Unless you know the particular type of mold will not make you sick or kill you, you should not eat it.