Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
Common sense would say adulthood, but I would go ahead and say 5 feet
Advantage - having natural automatic antibodies and defences to defend the body from any unknown organisms invading or intruding.
disadvantage -<span>The bodies of mammals are always maintaining the temperature through processes which is why constant food consumption is necessary.</span>
The idea that males and females of approximately equal physical attractiveness are likely to select each other as partners refers to the Matching hypothesis.
In the field of social psychology, the idea that people are more likely to form successful relationships with and express liking for people whole level of physical attractiveness roughly equals their own.
A good example is. A man of average attractiveness goes on one date with an extremely attractive person, and then another with an average-looking person. He finds he likes the average-looking date more.
The correct answer is osteoarthritis.
Osteoarthritis is also called degenerative joint disease and is the most common chronic disease of the joints. People suffering from osteoarthritis report pain in their joints, stiffness and loss of flexibility. It is caused by the deterioration of the cartilage between the joint spaces, which protects and acts as a cushion.
