Accessed 4 Nov. 2020. The Cardiovascular System: Blood Vessels and Circulation, 20.1 Structure and Function of Blood Vessels, 20.2 Blood Flow, Blood Pressure, and Resistance, 20.4 Homeostatic Regulation of the Vascular System, 20.6 Development of Blood Vessels and Fetal Circulation, Chapter 21. Again, if the body were supine or prone, to produce sagittal sections, the scanner would move from left to right or from right to left to divide the body lengthwise into left and right portions. 'All Intensive Purposes' or 'All Intents and Purposes'? To promote clear communication, for instance, about the location of a patient’s abdominal pain or a suspicious mass, health care providers typically divide up the cavity into either nine regions or four quadrants (Figure 1.4.4). By using precise anatomical terminology, we eliminate ambiguity. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! The longitudinal fibers of the marginal part of the orbicularis oris run below the skin around the mouth opening, originating and inserting within the tissue of the lips. The abdominopelvic/peritoneal cavity is the largest cavity in the body. The depressor anguli oris muscle is attached to the lower jaw (mandible). Start studying Auris Anatomy. By the end of this section, you will be able to: Anatomists and health care providers use terminology that can be bewildering to the uninitiated; however, the purpose of this language is not to confuse, but rather to increase precision and reduce medical errors. We call these scans. Here Be Dragons: A Creature Identification Quiz. The marginal part of the orbicularis oris closes the oral opening. What made you want to look up orbicularis? In human anatomy, the orbicularis oris muscle is the sphincter muscle around the mouth. “Orbicularis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/orbicularis. The upper limbs are held out to each side, and the palms of the hands face forward as illustrated in Figure 1.4.1. Regions of the body are identified using terms such as “occipital” that are more precise than common words and phrases such as “the back of the head.” Directional terms such as anterior and posterior are essential for accurately describing the relative locations of body structures. Synonym(s): musculus risorius [TA], Albinus muscle (1) , Santorini muscle It does not matter how the body being described is oriented, the terms are used as if it is in anatomical position. Both parts of the orbicularis oris are innervated by the buccal branch of the facial nerve (CN VII). Build a city of skyscrapers—one synonym at a time. The main function of the orbicularis oris is closing of the mouth. To further increase precision, anatomists standardize the way in which they view the body. Bone Tissue and the Skeletal System, 6.6 Exercise, Nutrition, Hormones, and Bone Tissue, 6.7 Calcium Homeostasis: Interactions of the Skeletal System and Other Organ Systems, 7.6 Embryonic Development of the Axial Skeleton, 8.5 Development of the Appendicular Skeleton, 10.3 Muscle Fiber Excitation, Contraction, and Relaxation, 10.4 Nervous System Control of Muscle Tension, 10.8 Development and Regeneration of Muscle Tissue, 11.1 Describe the roles of agonists, antagonists and synergists, 11.2 Explain the organization of muscle fascicles and their role in generating force, 11.3 Explain the criteria used to name skeletal muscles, 11.4 Identify the skeletal muscles and give their origins, insertions, actions and innervations, Chapter 12. Notice that the term “brachium” or “arm” is reserved for the “upper arm” and “antebrachium” or “forearm” is used rather than “lower arm.” Similarly, “femur” or “thigh” is correct, and “leg” or “crus” is reserved for the portion of the lower limb between the knee and the ankle. In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth.It is a sphincter, or circular muscle, but it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.. Body sections and scans can be correctly interpreted, only if the viewer understands the plane along which the section was made. 'Nip it in the butt' or 'Nip it in the bud'? Learn vocabulary, terms, and more with flashcards, games, and other study tools. Images of the body’s interior commonly align along one of three planes: the sagittal, frontal, or transverse. Learn a new word every day. There are three planes commonly referred to in anatomy and medicine, as illustrated in Figure 1.4.3. Test Your Knowledge - and learn some interesting things along the way. BabyCenter is committed to providing the most helpful and trustworthy pregnancy and parenting information in the world. Prone describes a face-down orientation, and supine describes a face up orientation. A female homologue of the male penis, the clitoris develops (as does the penis) from the genital tubercle of the fetus, and it plays an important role in female sexual response. The diaphragm forms the floor of the thoracic cavity and separates it from the more inferior abdominopelvic/peritoneal cavity. The Cardiovascular System: The Heart, 19.2 Cardiac Muscle and Electrical Activity, Chapter 20. Clitoris, female erogenous organ capable of erection under sexual stimulation. A plane is an imaginary, two-dimensional surface that passes through the body. These terms are sometimes used in describing the position of the body during specific physical examinations or surgical procedures. There are nine resulting regions. In which direction would an MRI scanner move to produce sequential images of the body in the frontal plane, and in which direction would an MRI scanner move to produce sequential images of the body in the sagittal plane? The thoracic cavity is enclosed by the rib cage and contains the lungs and the heart, which is located in the mediastinum. Delivered to your inbox! You will be able to describe the body’s regions using the terms from the figure. The Nervous System and Nervous Tissue, 12.1 Structure and Function of the Nervous System, Chapter 13. The body maintains its internal organization by means of membranes, sheaths, and other structures that separate compartments. The orbicularis oris (also orbicularis oris muscle, latin: musculus orbicularis oris) is a facial muscle that is located in the thickness of the lip around the oral opening. the source or beginning of anything, especially the more fixed end or attachment of a muscle (as distinguished from its insertion), or the site of emergence of a … The Peripheral Nervous System, 13.4 Relationship of the PNS to the Spinal Cord of the CNS, 13.6 Testing the Spinal Nerves (Sensory and Motor Exams), 14.2 Blood Flow the meninges and Cerebrospinal Fluid Production and Circulation, 16.1 Divisions of the Autonomic Nervous System, 16.4 Drugs that Affect the Autonomic System, 17.3 The Pituitary Gland and Hypothalamus, 17.10 Organs with Secondary Endocrine Functions, 17.11 Development and Aging of the Endocrine System, Chapter 18. The root of a term often refers to an organ, tissue, or condition, whereas the prefix or suffix often describes the root. Lateral describes the side or direction toward the side of the body. 18 Responses to “The anatomical juxtaposition of two orbicularis oris muscles in a state of contraction” suburbanlife Says: March 20, 2007 at 2:47 am | Reply. Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Devon Quick & Jon Runyeon, Creative Commons Attribution-ShareAlike 4.0 International License, Use appropriate anatomical terminology to identify key body structures, body regions, and directions in the body, Describe the human body using directional and regional terms, Identify three planes most commonly used in the study of anatomy. The more detailed regional approach subdivides the cavity with one horizontal line immediately inferior to the ribs and one immediately superior to the pelvis, and two vertical lines drawn as if dropped from the midpoint of each clavicle (collarbone). Inferior (or caudal) describes a position below or lower than another part of the body proper; near or toward the tail (in humans, the coccyx, or lowest part of the spinal column). The circular fibers composing the labial part of the orbicularis oris run between the angles of the mouth, having the origin and insertion site within the skin of the corners of the mouth. A section is a two-dimensional surface of a three-dimensional structure that has been cut. For example, a scar in the “anterior (front) carpal (wrist) region” would be present on the palm side of the wrist. The human body’s numerous regions have specific terms to help increase precision (see Figure 1.4.1). For instance, an anatomist might describe one band of tissue as “inferior to” another or a physician might describe a tumor as “superficial to” a deeper body structure. Chapter 1. Can you spell these 10 commonly misspelled words? Anatomical terms are made up of roots, prefixes, and suffixes. These terms are essential for describing the relative locations of different body structures. The orbicularis oris is supplied with arterial blood mainly by the superior and inferior labial branches of the facial artery, the mental and infraorbital branches of the maxillary artery and the transverse facial branch of the superficial temporal artery. The orbicularis oris has two main parts: the marginal part consisting of longitudinal fibers and the labial part of the orbicularis oris composed of circular fibers. The Cellular Level of Organization, 3.2 The Cytoplasm and Cellular Organelles, Chapter 4. The labial part of the orbicularis oris pushes the lips forward. A body that is lying down is described as either prone or supine. Anatomical terms are derived from ancient Greek and Latin words. Or is it at the base of the hand? Please contact. Using this standard position reduces confusion. Although no membrane physically divides the abdominopelvic cavity, it can be useful to distinguish between the abdominal cavity, (the division that houses the digestive organs), and the pelvic cavity, (the division that houses the organs of reproduction). In this lesson, learn the definition, innervation, and function of the orbicularis oris muscle. How to use a word that (literally) drives some pe... Do you know what languages these words come from? Because these languages are no longer used in everyday conversation, the meaning of their words do not change. This is a great definition, I’m going to use it on my husband tonight! It is also one of the muscles used in the playing of all brass instruments and some woodwind instruments. The simpler quadrants approach, which is more commonly used in medicine, subdivides the cavity with one horizontal and one vertical line that intersect at the patient’s umbilicus (navel). The main cavities of the body include the cranial, thoracic and abdominopelvic (also known as the peritoneal) cavities. The Tissue Level of Organization, 4.3 Connective Tissue Supports and Protects, 5.3 Functions of the Integumentary System, 5.4 Diseases, Disorders, and Injuries of the Integumentary System, Chapter 6. risorius: [TA] facial muscle of mouth; origin , from platysma and fascia of masseter; insertion , orbicularis oris and skin at corner of mouth; action , draws angle of mouth laterally, lenghthening rima oris; nerve supply , facial. The Cardiovascular System: Blood, Chapter 19. For example, is a scar “above the wrist” located on the forearm two or three inches away from the hand? The Chemical Level of Organization, 2.1 Elements and Atoms: The Building Blocks of Matter, 2.4 Inorganic Compounds Essential to Human Functioning, 2.5 Organic Compounds Essential to Human Functioning, Chapter 3. The term “anterior” would be used even if the hand were palm down on a table. Is it on the palm-side or back-side? Certain directional anatomical terms appear throughout this and any other anatomy textbook (Figure 1.4.2). Fluid, Electrolyte, and Acid-Base Balance, 27.3 Physiology of the Female Sexual System, 27.4 Physiology of the Male Sexual System, 28.4 Maternal Changes During Pregnancy, Labor, and Birth, 28.5 Adjustments of the Infant at Birth and Postnatal Stages. Medical definition of orbicularis: a muscle encircling an orifice. Just as maps are normally oriented with north at the top, the standard body “map,” or anatomical position, is that of the body standing upright, with the feet at shoulder width and parallel, toes forward.

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