Answer:
Cell
Explanation:
In anatomy, the basic structural unit of the body is the cell. All living organisms have cells, which start as the zygote — the single cell at the beginning of life, after a spermatozoa fertilizes an oocyte. In humans, the body has more than 200 different cell types.
The prevalence of HIV infections remained the same during the year of 1997
Female, I believe..I guess, males have more stronger lungs than females. So, yeah :]
Well.. Usually no...
Unless they didn't sterilize or clean the tools used for the surgery.
Which would be quite the rare occasion...
good luck!
Answer:
B) physiological
Explanation:
When we feel under pressure, our nervous system instructs the body to release stress hormones, such as adrenaline and cortisol, that produce <u>physiological changes</u> in order to help us cope with the threat or danger we see looming over us. It is what is called "stress response" or "fight or flight" reaction.
When we are stressed, the respiratory system suffers the effect immediately. It usually costs us more to breathe and we do it faster in an attempt to quickly bring oxygen-rich blood to the body.
Cardiovascular effects also occur. When the stress is acute (at that precise moment), the heart rate and blood pressure rise, but return to normal once this has passed. If acute stress is experienced repeatedly or if the stress becomes chronic (if it lasts for a long period of time), it can cause damage to the veins and arteries. <u>This increases the risk of hypertension, heart attacks or heart attacks</u>.