Why Is Blood Red

Explore the intriguing answers to more than 200 questions about the human body in DK's newest biology encyclopedia for kids. What does the heart do? What are bones made of? Why do your ears pop? This children's ebook, ideal for ages 6-9, will help inquisitive minds find out the answers to all the questions they may have about their bodies, and some they hadn't thought of! Covering amazing organs, stupendous senses, and the perplexing ways our bodies work, Why? Human Body helps children get to grips with the gigantic topic that is human biology. Each page asks a new question that kids might have about the human body, before answering it, and features a quick quiz testing children's knowledge of what they have just read. Bursting with mind-boggling details and fascinating facts, this visually stunning ebook is something that every young scientist will want to own.

This presentation describes various aspects of the regulation of tissue oxygenation, including the roles of the circulatory system, respiratory system, and blood, the carrier of oxygen within these components of the cardiorespiratory system. The respiratory system takes oxygen from the atmosphere and transports it by diffusion from the air in the alveoli to the blood flowing through the pulmonary capillaries. The cardiovascular system then moves the oxygenated blood from the heart to the microcirculation of the various organs by convection, where oxygen is released from hemoglobin in the red blood cells and moves to the parenchymal cells of each tissue by diffusion. Oxygen that has diffused into cells is then utilized in the mitochondria to produce adenosine triphosphate (ATP), the energy currency of all cells. The mitochondria are able to produce ATP until the oxygen tension or PO2 on the cell surface falls to a critical level of about 4–5 mm Hg. Thus, in order to meet the energetic needs of cells, it is important to maintain a continuous supply of oxygen to the mitochondria at or above the critical PO2 . In order to accomplish this desired outcome, the cardiorespiratory system, including the blood, must be capable of regulation to ensure survival of all tissues under a wide range of circumstances. The purpose of this presentation is to provide basic information about the operation and regulation of the cardiovascular and respiratory systems, as well as the properties of the blood and parenchymal cells, so that a fundamental understanding of the regulation of tissue oxygenation is achieved.

Fairy tales retold—with a twist—from “some of our best storytellers” including Neil Gaiman, Gahan Wilson, Tanith Lee, and others (The Washington Post). In this “no holds barred . . . nightmarish . . . provocative” collection, bestselling and award-winning fantasy masters put a dark, disturbing, and erotic spin on your favorite bedtime stories—and give you something entirely new to trouble your dreams (The New York Times Book Review). A boy is haunted through adulthood by a soul-eating creature that lies forever in wait under Neil Gaiman’s “Troll Bridge”; a melancholy amphibian shares his most private fantasies with a therapist in Gahan Wilson’s “The Frog Prince”; in Tanith Lee’s “Snow-Drop,” a lonely artist invites seven circus performers into her home to satisfy an obsession; in Steve Rasnic Tem’s “Little Poucet,” a band of lost brothers find refuge and terror with a hungry family in the woods; and Wendy Wheeler delves into the deviant psyche of the predatory male in “Little Red.” Also featuring Nancy Kress, Charles de Lint, Melanie Tem, Patricia A. McKillip, Jack Dann, and others, all paying a revisit to our favorite fairy tales in ways you’ve never dared to imagine.

The Russian Revolution. Fairy tale, spy thriller, love story. One man's life during the last days of the Romanovs, beautifully imagined by award-winning author Marcus Sedgwick. Shortlisted for the Costa Children's Book Award. Set in the rich and atmospheric landscape of Russia during the revolution that sent shockwaves around the world, this is the partly true story of Arthur Ransome - a writer accused of being a spy. Fictionalising history and blending it with one man's real life, Marcus Sedgwick expertly crafts this innovative and stimulating novel of three parts - a fairy tale full of wise and foolish kings, princesses, wishes and magic; a bleak and threatening spy thriller, and a love story . . .

This fast-paced YA debut novel has it all: smart, savvy characters making their way through an eerily dystopian society, with all the requisite action, adventure and romance characteristic of the genre vividly and at times, chillingly, portrayed. In a wild and lawless future, where life is cheap and survival is hard, eighteen-year-old Saba lives with her father, her twin brother Lugh, her young sister Emmi and her pet crow Nero. Theirs is a hard and lonely life. The family resides in a secluded shed, their nearest neighbour living many miles away and the lake, their only source of water and main provider of food, gradually dying from the lack of rain. But Saba's father refuses to leave the place where he buried his beloved wife, Allis, nine years ago. Allis died giving birth to Emmi, and Saba has never forgiven her sister for their mother's death. But while she despises Emmi, Saba adores her twin brother Lugh. Golden-haired and blue-eyed, loving and good, he seems the complete opposite to dark-haired Saba, who is full of anger and driven by a ruthless survival instinct. To Saba, Lugh is her light and she is his shadow, he is the day, she is the nighttime, he is beautiful, she is ugly, he is good, she is bad. So Saba's small world is brutally torn apart, when a group of armed riders arrives five day's after the twin's eighteenth birthday snatch Lugh away. Saba's rage is so wild, that she manages to drive the men away, but not before they have captured Lugh and killed their father. And here begins Saba's epic quest to rescue Lugh, during which she is tested by trials she could not have imagined, and one that takes the reader on breathtaking ride full or romance, physical adventure and unforgettably vivid characters, making this a truly sensational YA debut novel.

Tomi was born in Hawaii. His grandfather and parents were born in Japan, and came to America to escape poverty. World War II seems far away from Tomi and his friends, who are too busy playing ball on their eighth-grade team, the Rats. But then Pearl Harbor is attacked by the Japanese, and the United States declares war on Japan. Japanese men are rounded up, and Tomi’s father and grandfather are arrested. It’s a terrifying time to be Japanese in America. But one thing doesn’t change: the loyalty of Tomi’s buddies, the Rats.

disorders, and heart disease. It also provides new insights which may lead to new therapies." --Book Jacket.