The human brain is at particularly high risk for damage by free radicals because of its high degree of metabolism compared to other tissues, while lacking the levels of antioxidant protection found elsewhere in the body.
When we talk about stem cells, we are actually talking about a complicated series of things, including adult stem cells which are largely cells devoted to replacing individual tissues like blood elements or liver or even the brain.
Increasingly committed to human studies, I sought to collect several immature human oocytes from pieces of excised ovarian tissue, mature and fertilize them in vitro and transfer the resulting embryos into infertile women to help them conceive. Some ...
Perhaps they were looking for passion; perhaps they delved into this book as into a mysterious parcel - a gift box at the bottom of which, hidden in layers of rustling tissue paper, lay something they'd always longed for but couldn't ever grasp.
Is it bad to like the way the scars look on my skin? Oh, the way they feel under my hands. My body’s protecting itself, saying, “No, this barrier of scar tissue is to keep you out.
How do you not fall in love with him?" The tears begin flowing just as quickly as they were ceasing. I grab yet another tissue. "I don't not fall in love with him. I don't not fall in love with him a lot!
They'd had to empty their pockets and turn over Aunt Val's purse to the security guard. That way, I wouldn't be tempted to try to kill anyone with her lip gloss and her travel-size pack of tissues.
I cry when I think of all the tissues I’ve used over the years and all the trees I’ve killed. The more tears I cry, the more trees I kill, which causes me to cry even more.
A certain amount of volatility and drama can me healthy and keep things fun and interesting if you're willing at any moment during a fight to say, 'This means nothing. I love you, let's forget about it.
She was probably the girl I loved the most of all my girlfriends, but also the toughest one to make things work out with. If I had put that much effort into any of my other relationships, I'd be married with five kids now.
We took off our clothes, and we were basically in a sphere of love and light and warmth, and the rest of the world disappeared. It was better than I ever could have dreamed, it was that thing I had been looking for, that love mixed with the rapture o...
Smell was our first sense. It is even possible that being able to smell was the stimulus that took a primitive fish and turned a small lump of olfactory tissue on its nerve cord into a brain. We think because we smelled.
If I do hit that rope and do a hop, skip and a jump and get up as high as I can, I'm just going to hold my breath, because I know i'm going to hear all kinds of scar tissue popping.
The body responds to a calorie deficit by slowing down the metabolism and burning muscle tissue. That leads to weakness, sluggishness, slow times. In girls, it can also result in cessation of menstrual periods, which in turn leads to loss of bone den...
Dr. Solomon: Now, you understand I can't just give you new irises. Because if I do, the retinal scans will read the scar tissue, alarms will go off, and large men with guns will appear.
Growing up, I saw my mother cry exactly once. The morning of her brother's funeral. One long tear ran down her cheek through her make up until she caught it near her mouth and patted it dry with a tissue she pulled from inside her sleeve.
If we bought everything on the Internet, our eyes and mouths and nostrils would probably begin to film over with a tegument - one initially tissue-thin and capable of being removed each morning, but which gradually thickened and hardened until we wer...
In mid-July 2007, after a routine mammogram, I was diagnosed with breast cancer. As cancer diagnoses go, mine wasn't particularly scary. The affected area was small, and the surgeon seemed to think that a lumpectomy followed by radiation would eradic...
In the community of living tissues, the uncontrolled mob of misfits that is cancer behaves like a gang of perpetually wilding adolescents. They are the juvenile delinquents of cellular society.
It enclosed us in its laceries as we watched the moon spill across the Atlantic like wine from an overturned glass. With the light all around us, we felt secret in that moon-infused water like pearls forming in the soft tissues of oysters.
Walking out of the office, her nervous fingers made an ear out of the tissue in her pocket – luckily the thin sheets wouldn't hold the shape, and unfurled as she threw it on the pavement. On the journey home, her bus ticket became a tongue.
