(Source: sk0ptsy)
(Source: threewordphrase)
T cells are amazing white blood cells that play a crucial role in cell-mediated immunity. They can be divided into several categories - notably helper, cytotoxic, memory, regulatory, and natural killer (NK) - and their primary role within the immune system is to search out and destroy both invading pathogens and abnormal cells. Helper T cells also help to regulate the immune response.
The image above features a cytotoxic T cell, which destroy abnormal cells (most notably virally infected cells and tumour cells) and are also implicated in organ transplant rejection. Dendritic cells, pictured cyan blue in the photo, constitutively express high levels of both class I and class II MCH molecules - the type of receptor that cytotoxic T cells recognise - making them extraordinary potent activators capable of stimulating even “naive” T cells that have never encountered an antigen.
(Source: icanread)
my mature guy <3
10 things I hate about you
I hate the way you talk to me, and the way you cut your hair
I hate the way you drive my car
I hate it when you stare
I hate your big dumb combat boots, and the way you read my mind
I hate you so much it makes me sick, it even makes me rhyme
I hate the way you’re always right
I hate it when you lie
I hate the way you make me laugh, even worse when you make me cry
I hate ti when you’re not around, and the fact that you didn’t call
But mostly I hate the way I don’t hate you, not even close, not even a little bit, not even at all
