what is an isthmus?
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What is an Isthmus? An isthmus is a land bridge bordered on both sides by water that connects two larger bodies of land. A narrow strip of land with sea on either side. (dictionary.com) An Isthmus is a narrow strip of land connecting two larger land areas usually with water on either side. Of note, the Isthmus of Corinth connects the peninsula of Peloponnese with the rest of the Greek peninsula, the Isthmus of Panama connects the continents of North and South America (the Americas), and the Isthmus of Suez in Egypt connects Africa and Asia (or Eurasia).
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- Hydrophobic Interactions: Soluble globular proteins fold so that hydrophobic side chains are mostly sequestered in the core of the protein. The removal of the non-polar groups from water (i.e. the hydrophobic effect) is the primary force stabilizing tertiary structure. Most polar amino acid side chains are on the outside surface so they can hydrogen bond to water to solubilize the protein.
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sinus sinus-any of various air-filled cavities especially in the bones of the skull. ethmoid sinus, ethmoidal sinus, sinus ethmoidales-a sinus of the meatuses of the nasal cavity (behind the bridge of the nose). frontal sinus-one of a pair of cavities in the frontal bone.
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- nasomaxillary orifice. the slit-like opening between the maxillary sinus and the middle meatus of the nasal cavity. omasoabomasal orifice. large, oval opening at the end of the omasal canal which communicates with the abomasum. oviductal orifice. a slit-like opening in the avian urodeum. pyloric orifice
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- Full Definition of PENINSULA. : a portion of land nearly surrounded by water and connected with a larger body by an isthmus; also: a piece of land jutting out into the water whether with or without a well-defined isthmus.— pen·in·su·lar \-s(ə-)lər, -shə-lər\ adjective.See peninsula defined for English-language learners. a portion of land nearly surrounded by water and connected with a larger body by an isthmus; also: a piece of land jutting out into the water whether with or without a well-defined isthmus. — pen·in·su·lar \-s(ə-)lər, -shə-lər\ adjective.
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What is an peninsula? A peninsula is a long, narrow piece of land that is surrounded on  three sides by water. The state of Florida is a peninsula in the  United States.
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- That is, while a strait lies between two land masses and connects two larger bodies of water, an isthmus lies between two bodies of water and connects two larger land masses. Some straits have the potential to generate significant tidal power using tidal stream turbines.
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sinus Definition of sinus for Students. : any of several spaces in the skull mostly connected with the nostrils.
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- The isthmus, which is part of the thyroid gland, is the band of tissue that connects those wings. What does the thyroid do? The thyroids main job is to produce thyroid hormone. Hormones are chemicals that are secreted by glands which act like messengers telling specific body parts what to do. Thyroid hormones help the body make energy, keep body temperature regulated and assist other organs in their function.
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- The Isthmus of Panama. One of the most famous examples of the isthmus landform is the Isthmus of Panama. The Panama isthmus is a narrow strip of land that connects two larger bodies of land in Costa Rica and Colombia. Essentially, the Isthmus of Panama connects North and South America.he Isthmus of Tehuantepec. Though not as well known as Suez and Panama, the Isthmus of Tehuantepec in Mexico is another example of the landform. The Isthmus of Tehuantepec connects Mexico and Guatemala. It serves as a gateway to and from Central America.
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Cervical canal It corresponds to a slight constriction known as the isthmus that can be seen on the surface of the uterus about midway between the apex and base. The external orifice of the uterus is a small, depressed, somewhat circular opening on the rounded extremity of the cervix, opening to the vagina. Through this aperture, the cervical cavity communicates with that of the vagina. The external orifice is bounded by two lips, an anterior and a posterior.
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isthmus of thyroid isthmus of fauces the constricted aperture between the cavity of the mouth and the pharynx. isthmus of rhombencephalon the narrow segment of the fetal brain, forming the plane of separation between the rhombencephalon and cerebrum. isthmus of thyroid the band of tissue joining the lobes of the thyroid.
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- A device used by blacksmiths to forge iron. (ing'kŭs) [TA] The middle of the three ossicles in the middle ear; it has a body and two limbs or processes (long crus and short crus); at the tip of the long crus is a small knob, the lenticular process that articulates with the head of the stapes. Synonym(s): anvil. the INCUS.
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oscillation Mathematics. the difference between the least upper bound and the greatest lower bound of the functional values of a function in a given interval. Also called saltus. the limit of the oscillation in an interval containing a given point, as the length of the interval approaches zero. Origin of oscillation Expand Latin
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Incus The anvil or incus /ˈɪŋkəs/ is a bone in the middle ear. The anvil-shaped small bone is one of three ossicles in the middle ear. The incus receives vibrations from the malleus, to which it is connected laterally, and transmits these to the stapes, medially. The incus is so-called because of its resemblance to an anvil (Latin: Incus).
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Anatomy of the Female Pelvis The lower third of the uterus comprises the cervix. The upper boundary of the cervix is the level of the internal os, a narrowing of the uterus that is also referred to as the isthmus. The internal os is the opening between the cervix and the corpus. The external os is the opening between the cervix and vagina.
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aortic isthmus a slight constriction of the aorta immediately distal to the left subclavian artery at the point of attachment of the ductus arteriosus. aortic isthmus. A constriction in the fetal aorta between the ductus arteriosus and the left subclavian artery. The condition sometimes persists into adulthood.
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estuary An estuary is the place in the water where a tide and a river current meet, like the estuary at New York Harbor, where the Hudson River meets the Atlantic Ocean. Estuary, pronounced ES-choo-air-ee, comes from the Latin word aestuarium, meaning a tidal marsh or opening. The calm waters of an estuary, where the mouth of a river connects with the open sea and fresh water mixes with salty ocean water, makes the perfect home for many species of aquatic plants and animals.
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What are the paranasal sinuses? A sinus is a hollow, air-filled cavity in the skull that is connected to the nasal airway by a narrow hole in the bone (ostium). Normally all are open to the nasal airway through an ostium. Humans have four pair of these cavities each referred to as the: frontal sinus (in forehead)
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- Full Definition of ISTHMUS. 1. : a narrow strip of land connecting two larger land areas. 2. : a narrow anatomical part or passage connecting two larger structures or cavities. See isthmus defined for English-language learners. See isthmus defined for kids.ADVERTISEMENT.ull Definition of ISTHMUS. 1. : a narrow strip of land connecting two larger land areas. 2. : a narrow anatomical part or passage connecting two larger structures or cavities. See isthmus defined for English-language learners. See isthmus defined for kids. ADVERTISEMENT.
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sinusitis Sinusitis refers to an inflammation of the sinuses, airspaces within the bones of the face. Sinusitis is most often due to an infection within these spaces.
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Sinus (anatomy) Sinus (anatomy) Sinus is a sac or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. In common usage, sinus usually refers to the paranasal sinuses, which are air cavities in the cranial bones, especially those near the nose and connecting to it.
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- An estuary is a partially enclosed body of water where fresh water from rivers and streams mixes with salt water from the ocean. Estuaries are areas of transition between the land and the sea.They are often called bays, harbors, inlets or sounds.he Chesapeake Bay: the largest estuary in the United States. The Chesapeake Bay is the largest of more than 100 estuaries in the United States.
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estuary Estuary, pronounced ES-choo-air-ee, comes from the Latin word aestuarium, meaning a tidal marsh or opening.. The calm waters of an estuary, where the mouth of a river connects with the open sea and fresh water mixes with salty ocean water, makes the perfect home for many species of aquatic plants and animals. Chesapeake Bay and Puget Sound are estuaries.
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- 1. a narrow strip of land, bordered on both sides by water, connecting two larger bodies of land. 2. a relatively narrow passage or strip of tissue joining two cavities or parts of an organ.isthmos isthmós narrow, passage]. isthmus′isth, moid. adj. (Physical Geography) a narrow strip of land connecting two relatively large land areas. 2. (Anatomy) anatomy. a. a narrow band of tissue connecting two larger parts of a structure. b. a narrow passage connecting two cavities. [C16: from Latin, from Greek isthmos ]. (ˈɪs məs). n., pl. -mus•es, -mi (-mī).
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- Inappropriate sinus tachycardia (IST) is a syndrome of cardiac and extracardiac symptoms characterized by substantially fast sinus heart rate (HR) at rest (>100 bpm) or with minimal activity and disproportionate to physiologic demand.