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7 The human body is amazing! Like a machine, the human body is made of smaller parts that all work together. The human body is always working. Think about this: while you read this, your heart is pumping blood to your muscles and brain. You are breathing air into your lungs to give your body oxygen. Your eyes are blinking to clean them and make sure that they don t dry out. The last meal you ate is being turned into energy as it travels through your digestive system. Your hair, toenails and fingernails are all growing.

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9 Get plenty of sleep Clean your body eat & drink healthy Get lots of exercise An average human scalp has 100,000 hairs. A fetus acquires fingerprints at the age of three months. Every person has a unique tongue print. Humans shed about 600,000 particles of skin every hour - about 1.5 pounds a year. Every square inch of the human body has an average of 32 million bacteria on it.

10 Each square inch of human skin consists of twenty feet of blood vessels. By the time you turn 70, your heart will have beat some twoand-a-half billion times Every human spent about half an hour as a single cell. It takes 17 muscles to smile and 43 to frown. A sneeze can exceed the speed of 100 mph. Babies are born with 300 bones, but by adulthood we have only 206 in our bodies. A cough releases an explosive charge of air that moves at speeds up to 60 mph. Beards are the fastest growing hairs on the human body. By age sixty, most people have lost half of their taste buds. Fingernails grow faster than toenails.

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12 Bag O Bones!

13 the supporting frame that gives the body shape, protects and anchors delicate internal organs, and with the muscles, enables the body to move rigid organs that form the skeleton of the body the point where two bones meet the mineral that makes your bones hard Vocabulary Word Bank joint skeletal system calcium bones

14 the system that controls the movement and structure of the body tissue that enables your body to move Vocabulary Word Bank flexors and extensors muscle skeletal, smooth, and cardiac muscular system the pair of skeletal muscles that work together to move parts of the body the three types of muscles present in the human body Bicep contracts to raise the forearm Unused muscles relax Tricep contracts to lower the forearm

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17 Vocabulary Word Bank stomach digestive system nutrients digestion the system that processes energy-giving food in the body the process by which food is broken down and prepared for distribution throughout the body an organ of digestion foods that provide the body with energy and substances needed to maintain health

18 1. Digestion begins even before you start eating! It starts as soon as you smell food or see food that you like. You begin making spit (saliva) in your mouth that will help break down the food. 2. Then your teeth tear the food into smaller pieces. Spit gets these pieces wet, and contains enzymes that start breaking down the food, so you can swallow them more easily. 3. These chewed-up bits move down a tube called the esophagus and enter your stomach. Inside of your stomach are acid and more enzymes. Stomach muscles mix the food with this acid and dissolve it into a thick kind of soup. 4. From here, the soupy food moves to your small intestine. This long, twisting tube is almost 20 feet long! 5. Other organs, such as your liver, send more acid and enzymes. It breaks the food down even more.

19 6. Finally, the food has been broken down into tiny pieces, called nutrients, that are small enough for cells to absorb. 7. These nutrients slip through the walls of the intestines and get carried by your blood to all the cells of your body.

20 Urinary System Vocabulary Word Bank kidneys excretory system urine bladder Two renal arteries transport blood to the kidneys The two kidneys filter the blood, removing waste products from the bloodstream Two renal veins return useful nutrients back into the bloodstream the system that rids the body of waste the organs that filter waste from the body s bloodstream liquid waste that is removed from the body by the excretory system the organ that collects urine excreted by the kidneys prior to disposal by urination The two ureters carry urine from the kidneys to the bladder The urinary bladder temporarily stores urine until it is released from the body The urine travels down the urethra and exits the body during urination

21 Other Excretory Organs

22 the system that pumps blood through the body the organ responsible for pumping blood through the body a liquid that is circulated through the body as a way to transport nutrients, oxygen, and waste to and from all parts of the body a passageway through which blood circulates throughout the body (for example: arteries, veins, and capillaries)

23 Your heart is approximately the same size as your fist. It pumps about 1¼ gallons of blood through your body. Vocabulary Word Bank blood vessel circulatory system heart blood Arteries are blood vessels that transport oxygenated blood away from the heart to other parts of the body. Veins bring blood from the body back to the heart. Your blood carries nutrients, oxygen, and waste throughout your body. It also helps keep you healthy by clotting when you get injured and fighting off germs and disease. Blood contains plasma (a yellowish liquid that is 90% water) and three different types of cells: red blood cells transporters for your body white blood cells -produce antibodies that kill germs platelets -for clotting when you get a cut or scrape

24 the system that supplies the body with oxygen, and rids the body of carbon dioxide Vocabulary Word Bank respiration respiratory system diaphragm lungs the act of inhaling oxygen and exhaling carbon dioxide the pair of organs that deliver and transfer oxygen to the blood the sheet of muscle that helps pump air in and out of the lungs

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26 Your brain is the busiest place on earth, Thinking and dreaming and learning since birth, Deciding and guiding the things that you do, Night and day working its job never through

27 A human brain is about the size of a large grapefruit and weighs about three pounds, when fully grown! The cerebellum is the brain center for muscle movement, posture, and coordination. The cerebrum is the thinking brain where language, memory, and decision making are located. The brain stem controls automatic functions, such as heartbeat, blood pressure, breathing, and digestion.

28 the cells and organs of the body that reproduce and make new individuals the body-building instructions that determine a person s characteristics Vocabulary Word Bank fertilization reproductive system puberty genes the process of a sperm cell being transferred to the female s body and uniting with an egg cell the period of time when a child s reproductive organs develop and begin to function

29 placenta umbilical cord uterus cervix vagina

Human Body. The student knows that the human body is made of systems with structure and functions that are related.

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