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Human body

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The human body is the entire structure of a human being and comprises a head, neck, trunk (which includes the thorax and abdomen), arms and hands, legs and feet. Every part of the body is composed of various types of cell.



At maturity, the estimated average number of cells in the body is given as 37.2 trillion. This number is stated to be of partial data and to be used as a starting point for further calculations. The number given is arrived at by totalling the cell numbers of all the organs of the body and cell types. The composition of the human body is made up of a number of certain elements including carbon, calcium and phosphorus.

The study of the human body involves anatomy and physiology. The human body can show anatomical non-pathological anomalies known as variations which need to be able to be recognised. Physiology focuses on the systems and their organs of the human body and their functions. Many systems and mechanisms interact in order to maintain homeostasis. What Happens to the Body After Death. 1446 9ShareNew We don't like to think about it, but we're all destined to die one day.

What Happens to the Body After Death

When it happens, a lot of disgusting (but interesting) things start to happen. You may know about rigor mortis, but there is a lot more to the process of decomposition than that. Tech Insider created this comprehensive guide to all the creepy things that happen after you die. Be warned—it's not something to read while eating. [h/t: Tech Insider] 10 Head-Scratching Facts About Gray Hair. Whether it’s no big deal or a perplexing affront to your vanity, gray hair is a fact of life—and still a bit of a mystery. 1.

10 Head-Scratching Facts About Gray Hair

How Hair Turns Gray Hair grows in a follicle, a bulb-like tube on your scalp. The average head has 100,000 to 150,000 follicles, each operating independently from the others. Hair in its basic, unpigmented state is white. 2. New research reveals that graying may be from a build-up of hydrogen peroxide in the hair cell, which causes the hair to bleach itself on the inside. 3. When you’re born, your genes are already hardwired for when and how your hair will turn gray. 4. In a related matter, race also determines when you’re likely to gray. Artists Reveal the Bacterial Beauty of the Human Microbiome. "Symbiosis" by Rebecca D.

Artists Reveal the Bacterial Beauty of the Human Microbiome

Harris represents the microbiome through hand-embroidered French knots. Image Credit: Courtesy The Eden Center As a way to help nonscientists understand these organisms that call our bodies home, the Eden Center, an educational charity with a visitor center in Cornwall, U.K., commissioned 11 artists to explore the microbiome through a visual medium.

The new permanent exhibition, “Invisible You,” includes a 7-foot-tall bouncy inflatable gut, a paper sculpture of an E. coli bacterium, embroidery of microbial communities on human skin, and a sculpture containing a fecal transplant. “We wanted to take people inside their bodies, making the actual concept easier to understand,” Gabriella Gilkes, the Eden Project’s science program manager, tells mental_floss. Mellissa Fisher’s “Microbiological Portrait” is a sculpture cast from the artist’s face, covered in bacteria from her skin. "Other Self Portraits. " Human body.

Human Physiology

Structure of the human body. Systems of the human body. Developmental biology. Perspectives[edit] Developmental model organisms[edit] Often used model organisms in developmental biology include the following: Studied phenomena[edit] Cell differentiation[edit] Embryonic development[edit] Embryonic development does not always proceed correctly, and errors can result in birth defects or miscarriage.

Developmental biology

Embryology. 1 - morula, 2 - blastula 1 - blastula, 2 - gastrula with blastopore; orange - ectoderm, red - endoderm.

Embryology

Dissection of human embryo, 38 mm - 8 weeks Embryology (from Greek ἔμβρυον, embryon, "the unborn, embryo"; and -λογία, -logia) is the science of the development of an embryo from the fertilization of the ovum to the fetus stage. Embryonic development of animals[edit] Biomechanics. Page of one of the first works of Biomechanics (De Motu Animalium of Giovanni Alfonso Borelli) Word history[edit] The word "biomechanics" (1899) and the related "biomechanical" (1856) were coined by Nikolai Bernstein[citation needed] from the Ancient Greek βίος bios "life" and μηχανική, mēchanikē "mechanics", to refer to the study of the mechanical principles of living organisms, particularly their movement and structure.[3] Method[edit] Usually biological systems are much more complex than man-built systems.

Biomechanics

Numerical methods are hence applied in almost every biomechanical study. Subfields[edit] Applied subfields of biomechanics include: Sports biomechanics[edit] In sports biomechanics, the laws of mechanics are applied to human movement in order to gain a greater understanding of athletic performance and to reduce sport injuries as well. Continuum biomechanics[edit] Biomaterials are classified in two groups, hard and soft tissues. Anatomy. 3D Human Anatomy.