Facts For Ravenclaw

When do I know I’m Spider-Man?

You won’t. That’s all it is, Miles… a leap of faith.

Miles walks to the edge of the roof, the wind buffeting… and LEAPS! The camera is UPSIDE DOWN. Miles isn’t falling through frame. He’s RISING.

chemistry: a seat in the first row, diligent note taking, falling asleep in a textbook, color coded sticky notes but with no real system, fingers running across old ink

literature: studying in bed, a cat snoozing on the pillow, orchestral movie soundtracks playing softly, rereading passages that were absentmindedly passed through

math: strong cups of coffee, graph paper planners, crowded lecture halls, a furrowed brow, warm sweaters, that one special spot in the library

history: clicking pens, stacks and stacks of books, annotations in the margins, study sessions spread out on the floor, flickering candles, working in complete silence

biology: colorful illustrations, well worn flashcards, reusable water bottles, always breaking pencil lead, carefully drafting important emails

art: getting lost in readings, pastry and a coffee, receipts repurposed as bookmarks, love for rainy days, in class hand raising anxiety, a whirlwind of a backpack

world languages: early mornings, a deep seated quizlet addiction, studying with friends, practicing presentations aloud in an empty room, fidgeting in chairs, detailed study guides

engineering: hands running through hair, cups of tea either drank while they’re too hot or entirely forgotten, typing quickly, the sound as hallways fill in between classes

A blood type (also called a blood group) is a classification of blood, based on the presence and absence of antibodies and inherited antigenic substances on the surface of red blood cells (RBCs). 

inherited from both parents. 

A total of 36 human blood group systems exist - ABO and the Rh determine someone’s blood type (A, B, AB and O, with +, − or null denoting RhD status) 

Typing is essential for suitability in blood transfusion

Antibodies in an individual’s plasma are directed against blood group antigens that their own RBCs lack

(this is confusing, it’ll take a while before you can look at blood typing stuff without having to think)

The ABO blood group system involves two antigens and two antibodies found in human blood. 

antigen A and antigen B - on the RBCs

antibody A and antibody B - in the serum

All humans can be classified into 4 groups:

Antigen A with antibody B

Antigen B with antibody A

Antigen AB has no antibodies

Antigen nil (group O) with antibody A and B.

Agglutination (clotting) reaction occurs between similar antigen and antibody. This is a seriously dangerous reaction (essentially all your blood turns to jelly) - if a patient with A  antibody in their serum is given blood with A antigen on the surface, they could die.

Group O = universal donor –> has no antigens on the RBCs, can be given to anyone and no agglutination will occur because nothing to react with the antibodies in serum

Laugh From Around The World In Messages.

(via A Magical Series of Harry Potter Pies)