SHE BLINDED ME WITH SCIENCE An ABC Book of ANATOMY AND PHYSIOLOGY By Brandon HIntergardt A IS FOR ALLELE An allele is an alternate form of gene on a part of a chromosome. Organisms have two alleles for each trait, often written with capital and lowercase letters (RR, Rr, rr). B IS FOR BRAIN The human brain is larger than any other mammals in relation to body size. While making up 2% of total body weight it represents 20% of the energy consumed. Other C IS FOR CELL Cells are the basic unit of life. The first of the five unifying principles of biology. Humans are made up of about ten trillion cells. The D IS FOR DIPLOID A cell with two sets of chromosomes. Usually one set comes from one parent and the other from the other parent. This is often written as 2n=2x. Almost all mammals are E IS FOR EUKARYOTE Eukaryotes are cells that contain membrane bound structures. The most important membrane bound structure is the nucleus which contains all the genetic information of the cell. Eukaryotes divide through mitosis and meiosis. F IS FOR FAT Fats are vital in maintaining healthy skin, hair, insulating body organs, and maintaining body temperature. Adipose tissue (fatty tissue) is the bodys main way of storing energy. An excess of adipose tissue can lead to diabetes and heart disease. G IS FOR GOUT A medical condition where uric acid crystallizes in the joints causing pain. The big toe is the most commonly affected joint although it can present H IS FOR HICCUPS Hiccups are caused by muscle spasms in the diaphragm. Medically they are known as synchronous diaphragmati c flutter. Hiccups are only found in mammals. I IS FOR INSULIN Insulin is secreted by the pancreas and allows liver, muscle, and fat cells to absorb glucose from the blood. Insulin is essential in regulating metabolism. In the liver and muscles, glucose is stored as glycogen. Insulin can stop J IS FOR JOINTS Joints are the locations where two bones meet. They allow movement and provide support. They can be classified by structure or function. There are three types of structural joints and three major types of functional joints. Structural classification is based on how K IS FOR POTASSIUM? Potassium is a chemical element necessary for many body functions including muscle contractions. In order for muscle contraction to occur sodium must be pumped out of the cell and a large concentration of potassium is pumped into the L IS FOR THE WAY YOU LOOK AT ME Love, according to biologists, is defined as a mammalian drive, similar to hunger and thirst. Love can be divided into three parts, lust, attraction, and attachment. Lust is the initial feeling of desire. Attraction is M IS FOR MITOCHONDRIA Mitochondria are found in most eukaryotes and produce ATP. They are considered the “power plant” of the cell. The number of mitochondria differs by organism and tissue. In N IS FOR NEURON Neurons or nerve cells transmit information via electrochemical signal. Neurons connect to each other. Chemical signaling occurs across the synapse. There has been numerous studies performed on O IS FOR OXYGEN Oxygen is a chemical element essential to survival. Air is about 21% oxygen. During respiration, the human body will exhale about 14% oxygen in addition to carbon dioxide. This is why rescue breathing during CPR is effective. P IS FOR PENIS Penises are essential to reproduction and are the organ that delivers sperm into females. The human penis has three columns of tissue. The urethra runs through the penis and is Q IS FOR QUADRICEPS Also referred to as quads, the quadriceps make up the four major muscles on the anterior side of the thigh. All quadriceps extend the knee joint R IS FOR RECTUM The rectum stores feces. As the rectum walls stretch, nerves in the walls trigger the urge to defecate. If the individual does not defecate, feces will be pushed back S IS FOR SPHINCTER A circular muscle that constricts to obstruct a body passage. There are over 50 types of sphincter in the human body. Examples include the epiglottis which closes T IS FOR T CELLS T Cells are a type of white blood cell. They have a t cell receptor on their cell surface. There are five major types of t cells, helper, cytoxic, memory, regulatory, and natural killers. Helper t cells assist other white blood cells. Memory t cells remain in the body after the infection has passed to guard U IS FOR ULCER An ulcer is a break in a membrane that inhibits the membranes intended function. Ulcers can be found all over the body including the feet, back, mouth, genitals, and stomach (and are usually gross). Ulcers have many causes from physical to mental stress. V IS FOR VENTRICLE Ventricles are the two largest chambers of the heart. The right ventricle pushes deoxygenated blood to the lungs while the left ventricle, W IS FOR WATER Water is essential to life. All known life forms require water. Water acts as a solvent and is needed for many metabolic processes like catabolism, the X IS FOR XIPHOID PROCESS A small cartilaginous process located at the end of the sternum. In adults it becomes ossified or hardened and is connected to the sternum via a non moveable joint. The Y IS FOR Y CHROMOSOME One of two sex determining chromosomes in humans. It contains a gene which initiates the creation of testis. The Y chromosome is passed from father to son. Due to the Z IS FOR ZYGOMATIC ARCH The zygomatic arch is more commonly known as the cheekbone and helps protect your eyes. Because of this the zygomatic arch is often broken resulting in a deep