S: Seasons of Change
FC: The Human Body
1: All the information was researched & compiled by Nicole Barbara Rebecca Marie Falzon Sarah Marie Falzon Melanie Zahra St.Theresa Girls School, Mriehel
2: The human body is the only machine for which there are no spare parts. Hermann M. Biggs
3: It was discovered that the longer the ring finger in boys the less risk they have of getting a heart attack. | The Heart The heart beats about 100,000 times each day. It beats roughly 35 million times a year. | It weighs approximately 250 to 300 grams in females and 300 to 350 grams in males.
4: The Eye Our eyes blink over 27,397 times every day. Our eyeball weighs approximately 28 grams. Under the right conditions the human eye can see the light of a candle at a distance of 23 km.
5: The Tongue The tongue is the strongest muscle in the human body and it is the only one that is connected to one end. | There are over 10,000 taste buds on our tongues and nearly 50% of the bacteria in the mouth lives on the tongue.
6: The Ear The human ear has three main sections which are the outer ear, the middle ear and the inner ear. Sound waves enter your outer ear and travel through your ear canal to your middle ear. The hammer , anvil and stirrup, which are found in the inner ear are the three smallest bones in the body . They could all fit on a penny. The ear never stops working.
7: The Nose A pair of openings into the nose called nostrils, allow air to be pulled into the nose and into the nasal cavity. | The nose acts as a filter to clean the air being inhaled and as a sensory organ to detect smells in the environment. The human nose can distinguish 10,000 different smells.
8: "The Teeth The enamel, which is in your teeth, is the hardest substance in the human body. Teeth are kept alive by blood and nerves. | Your teeth start growing six months before you are born.
9: The Lips Lips are one of the most sensitive parts of the human body. Strictly speaking lips are not exactly red – they just appear that way because of the thin skin on the lips and the amount of tiny blood vessels found in this area. | The enzymes in saliva that break down your food, do the same thing to your lips when you lick them, causing them to get dry and cracked.
10: Nails grow at the rate of 0.1 mm daily (or 1 cm in every 100 days). So, for a finger nail to regrow completely, it takes between 4 and 6 months. | Nails grow faster on young people than on old people. Also nails grow much faster during pregnancy. | The Nails
11: The Hair The maximum length of hair is 70 to 90 cm. The reason why hair gets grey when we grow up is because the pigment cells which gives colour to the hair, start to die. .It is one of the fastest tissues in the human body.
12: The Skin Your skin is made up of three major layers - epidermis, dermis, and hypodermis. Your skin protects your inside organs while keeping infections out and prevents you from getting sick Your skin loses about 30,000 to 40,000 dead skin cells from the surface almost every minute, even though you do not see it happening.
13: Estimates for the number of nerve cells in the human brain range from 80 to 120 billion. Its weight is 1.4 kg. | The human brain is the fattest organ in the body and may consists of at least 60% fat. It can hold 5 times as much information as the Encyclopedia . | The Brain
14: The Human Stomach The stomach is an organ of digestion. It has a sack-like shape and is located between the esophagus and the intestines. | The human stomach is an elastic bag which changes according to the body position and the amount of food in it. Human stomach acid is strong enough to dissolve a razor blade.
15: The Human Liver The liver is the largest organ in the body. The liver is a reddish brown organ with four lobes of unequal size and shape. A human liver normally weighs 1.44–1.66 kg. | Because the liver is the manager of your blood stream, it has the capacity to filter out over a litre of blood per minute.
16: The Human Blood 7-8% of the human body weight comes from the blood. In an adult there are 97,000 km of blood vessels. In a child there are 16,000 km. The blood circulates around the body about 1,000 times a day.
17: Each kidney is about 11 - 12 cm long and weighs approximately 130 gr. The kidneys of a newborn baby are very large in proportion to its body weight. | The Human Kidneys The kidneys have a higher blood flow than even the brain, liver or heart.
18: The Lungs The primary functions of your lungs are to transport oxygen from the air you breathe into your bloodstream while taking away carbon dioxide, which is released into the air when you breathe out. | When resting, the average adult breathes around 12 to 20 times a minute. An average person breathes in around 11,000 litres of air every day.
19: . | Humans have 206 bones in their body. 14 bones are in their faces. 8 bones are in each wrist 3 bones are in each foot including the ankle. Bones consist of 50% water and 50% solid matter | At birth, humans have over 300 bones. As they grow, some of these bones begin to fuse together and by the time they become adults, they have 206 bones. | The Human Bones
20: The Human Digestive System We eat about 500kg of food per year and approximately 1.7 liters of saliva is produced each day. | Every day 11.5 liters of digested food liquids and digestive juices flow through the digestive system with only 100mls being lost.
21: The Human Muscular System There are muscles in the root of your hair that give you goose bumps. It takes 17 muscles to smile and 42 to frown. | The hardest working muscle is in the eye. The smallest muscle is located in the ear it is called the Stapedius while th longest one is the Sartorious, it runs along the thigh.
22: The Human Respiratory System | The highest recorded ''sneeze speed'' is 165 km per hour. | We lose half a litre water a day through breathing.This is the water vapour we see when we breath on glass. | The right lung is slightly larger than the left one. Hairs in the nose clean the air being breathed as well as warming it .
23: The Human Circulatory System About 8 million blood cells die every second and the same amount are produced each second. Within a tiny droplet of blood there are 5 million red blood cells. It takes about 20 seconds for a red blood cell to circle the whole body. Red blood cells may live for about 4 months circulating around the body, feeding the other 60 trillion body cells. | Blood that is rich in oxygen appears red whereas blood that is poor in oxygen appears blue.
24: The Human Immune system. This is the body's defense system and it can be boosted by reducing stress. Dieting weakens the immune system | It can also be effected by toxins and pesticides. People who lack humour in their lives tend to have less protective immune responses .
25: The Human Nervous System The number of nerve cells in the human body exceeds the number of stars in the Milky Way. | The nervous system is very quick; it can transmit impulses at a tremendous speed of 100 meters per second. | The speed of message transmission to the brain can be as high as 290 km per hour. This can be permanently damaged easily.
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