Word: bloodstreams
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...natural pesticides in sweat, saliva and tears, dissolved by stomach acids or trapped in the sticky mucus of the nose or throat before being expelled by a sneeze or a cough. But the organisms are extraordinarily persistent, and some occasionally breach the outer defenses. After entering the bloodstream and tissues, they multiply at an alarming rate and begin destroying vital body cells...
Early-warning cells constantly monitor the bloodstream and tissues for signs of the enemy. With the gusto of Pac-Man, they gobble up anything that is foreign to the body. They envelop dust particles, pollutants, microorganisms and even the debris of battle: remnants of invaders and infected or damaged body cells. Other early warners direct the production of unique killer cells, each designed to attack and destroy a particular type of intruder. Some of the killers, alerted to body cells that have become cancerous, may annihilate these...
...figure was disturbing to my parents. Lee had admitted to being a frequent user of marijuana, and to avoid penalty from the Baseball Commission for smoking it, he fabricated a story of sprinkling pot on his organic buckwheat pancakes. The THC, he claimed, would be activated in his bloodstream as he jogged to practice. Then-baseball commissioner Bowie Kuhn never did figure out if he could charge Lee with anything...
...research, published last week in the quarterly journal AIDS Research and Human Retroviruses, may help explain why some AIDS carriers can go on having unprotected sex for years without passing the virus to a regular partner. Although it is known that enough of the virus appears in the bloodstream shortly after infection to spread the disease via blood transfusions, sexual transmission is a different matter. The new study, of 24 hemophiliac AIDS carriers, shows that despite repeated sexual contact without condoms, the wives or steady female partners of these men generally remained free of the virus for several years...
...thing, promiscuity and prostitution are common in parts of Africa, and general standards of hygiene and medical care are low. Scientists believe widespread venereal diseases in Africa also contribute to the spread of AIDS by causing genital ulcerations that make it easier for the virus to enter the bloodstream. Finally, Africans suffer from more nonvenereal viral and parasitic diseases than do Americans, and the Africans' overtaxed immune systems may be more vulnerable to the AIDS virus...