Human Anatomy

A:

According to a National Geographic article, the best available estimate of the number of cells contained in the human body is 37.2 trillion. The researchers who conducted the study added up the estimates for the total number of each type of cell to arrive at the total estimate.

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  • What Is the Relationship Between Intelligence and Creativity?

    Q: What Is the Relationship Between Intelligence and Creativity?

    A: The relationship between intelligence and creativity is not fully understood, although recent research suggests that intelligent people naturally crave higher levels of creativity. Research also suggests that intelligence and creativity overlap, meaning that intelligent individuals have a high capacity for creativity, and vice versa. This is somewhat counter to previous ideas that suggested creativity raises intelligence levels.
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  • What Is the Torso Area of the Body?

    Q: What Is the Torso Area of the Body?

    A: The torso is the main part of the body to which the neck and limbs attach, and it is a common feature of all vertebrates. The torso holds the body’s major internal organs except for the brain. Often, scientists refer to either the lower torso or the upper torso for better clarity.
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  • What Are the Roles of Joints, Bones and Muscles?

    Q: What Are the Roles of Joints, Bones and Muscles?

    A: Bones, muscles and joints play an important role in the human body. They, along with tendons, ligaments and cartilage, form the musculoskeletal system and enable us to perform physical activity. The musculoskeletal system protects and supports internal organs, allows movement, gives the body its shape, produces blood cells, stores calcium and phosphorus, and produces heat.
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  • What Is the Average Height for an Adult?

    Q: What Is the Average Height for an Adult?

    A: The Centers for Disease Control and Prevention identifies the average height for American women as about 5 feet, 4 inches tall. The average man is just over 5 feet, 9 inches tall.
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  • Why Are Females More Flexible Than Males?

    Q: Why Are Females More Flexible Than Males?

    A: Women’s bodies are more flexible than men's to allow women to carry and eventually hold a baby, according to Harvard University. This is caused in part by the hormone estrogen, which promotes the lengthening of muscles, according to Krav Maga for Fitness.
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  • How Many Taste Buds Are on the Human Tongue?

    Q: How Many Taste Buds Are on the Human Tongue?

    A: According to KidsHealth, the average human tongue has about 10,000 taste buds. In many people, there is a regular turnover every two weeks and all the taste buds are replaced.
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  • Do Eyes Grow After Birth?

    Q: Do Eyes Grow After Birth?

    A: According to the Chicago College of Medicine, eyes do continue to grow after birth. A newborn's eyes are about 75 percent the size they are going to be when fully grown.
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  • Where Is the Torso Located on the Body?

    Q: Where Is the Torso Located on the Body?

    A: In the bodies of humans, as well as many animals, the torso or trunk, is the area of the body that contains the chest and abdomen, and includes the area of the body between the neckline and pelvis, excluding limbs. The torso includes internal and external features of the human body, such as important organs like the kidney, heart, lungs and liver, the skin and several types of muscles. These skeletal components work together to carry out many critical life functions, such as respiration, digestion and reproduction.
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  • When Do Men Stop Growing?

    Q: When Do Men Stop Growing?

    A: Most males have reached their full height by age 16, but their muscles still grow. Much of the height increase comes from a growth spurt between ages 12 and 16. During this period, boys often add as many as 12 inches. They also put on weight, and this gain typically ranges from 15 to 65 pounds.
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  • Are Attached Earlobes Dominant or Recessive?

    Q: Are Attached Earlobes Dominant or Recessive?

    A: Attached earlobes are considered to be recessive. Free earlobes are a dominant trait. This means that far more people have earlobes that are unattached.
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  • What Is a Nasal Passage?

    Q: What Is a Nasal Passage?

    A: The nasal passage is a channel wherein air flows through the nose. Respiratory mucous membranes with many hair-like cells line the walls of this passage.
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  • What Are the Advantages of Jointed Appendages?

    Q: What Are the Advantages of Jointed Appendages?

    A: Jointed appendages are an advantage because they allow for any activity that requires movement, including walking, swimming, feeding, and defense. Jointed appendages act the same as a system of levers or like the joints on the human body.
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  • What Age Do Feet Stop Growing?

    Q: What Age Do Feet Stop Growing?

    A: The growth plates in feet stop growing sometime during the late teen years, but shoe size often continues to change over the course of a person's lifetime.
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  • What Is the Relationship Between Anatomy and Physiology?

    Q: What Is the Relationship Between Anatomy and Physiology?

    A: Anatomy is the study of form, while physiology is the study of function, according to Wikipedia. Anatomy is the scientific study of the structure of organisms including their systems, organs and tissues. It details the appearance and position of various parts, their material compositions and their locations and relationships with other parts. Physiology deals respectively with the functions of those anatomical parts and the chemical processes involved.
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  • At What Age Does a Girl Stop Growing?

    Q: At What Age Does a Girl Stop Growing?

    A: On average, girls reach their final adult height and stop growing by age 14 or 15, though this figure skews either younger or older depending on when puberty begins. Most girls experience a growth spurt between ages 10 to14, and a female's rate of growth peaks around two years after puberty begins, which is usually around age 12.
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  • How Much Pressure Can the Human Body Withstand?

    Q: How Much Pressure Can the Human Body Withstand?

    A: Jacques Cousteau recorded the deepest official scuba dive by Maurice Fargues at 117m, approx. 13 atmospheres of pressure, or 191 pounds per square inch. However, no definitive answer exists. The real danger in intense pressure on the body comes from several factors related to the pressure and the surroundings.
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  • What Parts of the Body Keep Growing As a Person Ages?

    Q: What Parts of the Body Keep Growing As a Person Ages?

    A: There is evidence that the cranial bones, pelvic bones and ear cartilage continue to grow into adulthood. It is believed that all other body parts stop growing when one reaches maturity.
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  • What Are All the Finger and Toe Bones Called?

    Q: What Are All the Finger and Toe Bones Called?

    A: The finger and toe bones are called phalanges. Each finger and toe, with the exception of the thumb and great toe, has proximal, middle and distal phalanges.
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  • What Part of the Brain Does Music Affect?

    Q: What Part of the Brain Does Music Affect?

    A: Initially, a person's temporal and frontal lobes begin processing the sounds of music when a song begins to play, with brain cells deciphering melody, rhythm and pitch. Many researchers believe most activity concerning music happens in the brain's right hemisphere, while other researchers say it happens on both sides.
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  • Why Do People Have Dimples?

    Q: Why Do People Have Dimples?

    A: Dimples are the result of a deformity that makes facial muscles shorter than normal. The shorter muscles pull the skin when the person smiles, causing indentations in the skin known as dimples. As a person ages, dimples sometimes disappear as muscles naturally lengthen.
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  • How Does Your Leg Work?

    Q: How Does Your Leg Work?

    A: The functioning of the human leg is the result of cooperation between the muscles and bones located there. Many muscles involved in leg function are quite large and use powerful contractions to propel and support the body. In addition muscles combined with the leg's bone structure are responsible for adjusting to minute changes, thus ensuring the body remains balanced in standing, walking or running modes.
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