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Biomechanics. Page of one of the first works of Biomechanics (De Motu Animalium of Giovanni Alfonso Borelli) Word history The word "biomechanics" (1899) and the related "biomechanical" (1856) were coined by Nikolai Bernstein 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. Method Usually biological systems are much more complex than man-built systems.
Spleen. The spleen synthesizes antibodies in its white pulp and removes antibody-coated bacteria and antibody-coated blood cells by way of blood and lymph node circulation.
A study published in 2009 using mice found that the spleen contains, in its reserve, half of the body's monocytes within the red pulp. These monocytes, upon moving to injured tissue (such as the heart), turn into dendritic cells and macrophages while promoting tissue healing. The spleen is a center of activity of the mononuclear phagocyte system and can be considered analogous to a large lymph node, as its absence causes a predisposition to certain infections. In humans, the spleen is brownish in color and is located in the left upper quadrant of the abdomen. Structure The spleen, in healthy adult humans, is approximately 7 centimetres (2.8 in) to 14 centimetres (5.5 in) in length.
Surfaces Congenital heart defect. Congenital heart defect (CHD) or congenital heart anomaly is a defect in the structure of the heart and great vessels that is present at birth.
Many types of heart defects exist, most of which either obstruct blood flow in the heart or vessels near it, or cause blood to flow through the heart in an abnormal pattern. Other defects, such as long QT syndrome, affect the heart's rhythm. Circulatory system. The circulatory system is often seen to be composed of both the cardiovascular system, which distributes blood, and the lymphatic system, which circulates lymph.These are two separate systems.
The passage of lymph for example takes a lot longer than that of blood. Blood is a fluid consisting of plasma, red blood cells, white blood cells, and platelets that is circulated by the heart through the vertebrate vascular system, carrying oxygen and nutrients to and waste materials away from all body tissues. Lymph is essentially recycled excess blood plasma after it has been filtered from the interstitial fluid (between cells) and returned to the lymphatic system. The cardiovascular (from Latin words meaning 'heart'-'vessel') system comprises the blood, heart, and blood vessels. The lymph, lymph nodes, and lymph vessels form the lymphatic system, which returns filtered blood plasma from the interstitial fluid (between cells) as lymph.
Structure Cardiovascular system. Trunk (anatomy) Trunk or torso is an anatomical term for the central part of the many animal bodies (including that of the human) from which extend the neck and limbs. The trunk includes the thorax and abdomen.
The trunk also harbours many of the main groups of muscles in the body, including the: The organs and muscles etc. are innervated by various nerves, mainly originating from thoracic vertebrae segments. For instance, the cutaneous innervation is provided by: Head and neck anatomy. Head and neck anatomy focuses on the structures of the head and neck of the human body, including the brain, bones, muscles, blood vessels, nerves, glands, nose, mouth, teeth, tongue, and throat.
It is an area frequently studied in depth by surgeons, dentists, dental technicians, and speech language pathologists. Musculoskeletal system (a) cranium (8 bones: frontal, 2-parietal, occipital, 2-temporal, sphenoid, ethmoid), and (b) facial bones (14 bones: 2-zygomatic, 2-maxillary, 2-palatine, 2-nasal, 2-lacrimal, vomer, 2-inferior conchae, mandible). As the fetus develops, the facial bones usually form into pairs, and then fuse together. As the cranium fuses, sutures are formed that resemble stitching between bone plates. Anatomical terms of motion. In general, motion is classified according to the anatomical plane it occurs in.
Flexion and extension are examples of angular motions, in which two axes of a joint are brought closer together or moved further apart. Rotational motion may occur at other joints, for example the shoulder, and are described as internal or external. Other terms, such as elevation and depression, refer to movement above or below the horizontal plane.
Many anatomical terms derive from Latin terms with the same meaning. Classification Anatomy. Anatomy is the branch of biology concerned with the study of the structure of animals and their parts; it is also referred to as zootomy to separate it from human anatomy.
In some of its facets, anatomy is related to embryology and comparative anatomy, which itself is closely related to evolutionary biology and phylogeny. Human anatomy is one of the basic essential sciences of medicine. Definition Human compared to elephant frame Anatomical chart by Vesalius, Epitome, 1543 The discipline of anatomy can be subdivided into a number of branches including gross or macroscopic anatomy and microscopic anatomy. Gross anatomy is the study of structures large enough to be seen with the naked eye, and also includes superficial anatomy or surface anatomy, the study by sight of the external body features.
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Neuroscientist Sam Harris Selects 12 Books Every Intelligent Person Should Read. By Maria Popova From Bertrand Russell to the Buddha, or why you should spend a weekend reading the Qur’an. On an excellent recent episode of The Tim Ferriss Show — one of these nine podcasts for a fuller life — neuroscientist Sam Harris answered a listener’s question inquiring what books everyone should read. As a lover of notable reading lists and an ardent admirer of Harris’s mind and work, I was thrilled to hear his recommendations — but as each one rolled by, it brought with it an ebbing anticipatory anxiety that he too might fall prey to male intellectuals’ tendency to extoll almost exclusively the work of other male intellectuals. (Look no further than Neil deGrasse Tyson’s reading list for evidence.) And indeed Harris did — the books he recommended on the show, however outstanding, were all by men.
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