Four brains Most people believe that we have one brain and that it is the size of a basketball. In reality, each human has four brains! The other three consist of an inner brain in the spinal column, a brain stem, and a cerebellum housed within the …
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5 senses The human body has five traditional senses to identify information from the outside world. The sixth sense is sometimes called “psychic” or “extra” since it can not be understood under scientific terms…
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32 teeth The adult human mouth has 32 teeth: 16 in the upper jaw and 16 in the lower jaw. These 32 teeth are divided into 4 groups. Each group of teeth is similar in shape and function but differs from the teeth in …
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The heart The heart is the most efficient pump in the world. It works all our lives, non-stop. It performs more than 36 million beats in a lifetime, and 100 thousand kilometers of blood vessels travel. If we …
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The thigh bone ( femur ) is the largest in the human body. It is located between the pelvis and the knee (upper leg). It is classified as a long bone, making up approximately one-third of our height. The head …
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The skin , which covers almost the entire body and makes up 15% of its weight, is the largest and widest organ in the body. The skin belongs to the covering system, including the hair, sweat glands, and various sensory organs found …
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16-20 feetThe length of the intestines is approximately six feet if you include the end part of the small intestine – ileum. However, this number may vary from person to person. The total length of our intestines is about 13 meters and only a …
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The body’s control center The brain is the main organ in the nervous system, which is located in the bodies of multicellular animals. The function of the brain is to receive information from sensory systems and process and use it to manage body activities, such …
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Stapes is a stirrup-shaped bone located in the inner ear. It is one of three bones known as ‘auditory ossicles.’ The other two auditory ossicle bones are the malleus and incus. The purpose of the stapes and auditory ossicles is to …
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From the kidneys and bladder Pee or urine comes from the kidneys and then accumulates in the bladder until it is eliminated conveniently. In some animals, urine is also used as a method of communication through scent marking. This makes sense because dogs will mark their territory …
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