transverse plane

(noun)

divides a body into upper and lower portions

Related Terms

Examples of transverse plane in the following topics:

  • Animal Body Planes and Cavities

    • A sagittal plane divides the body into right and left portions.
    • A frontal plane (also called a coronal plane) separates the front (ventral) from the back (dorsal).
    • A transverse plane (or, horizontal plane) divides the animal into upper and lower portions.
    • This is sometimes called a cross section; if the transverse cut is at an angle, it is called an oblique plane .
    • The frontal plane divides the front and back, while the transverse plane divides the body into upper and lower portions.

  • Skeletal Muscle Fibers

    • The sarcolemma of myocytes contains numerous invaginations (pits) called transverse tubules which are usually perpendicular to the length of the myocyte.
    • Transverse tubules play an important role in supplying the myocyte with Ca+ ions, which are key for muscle contraction.
    • Each myofibril is surrounded by the sarcoplasmic reticulum, which is closely associated with the transverse tubules.
    • The sarcoplasmic reticulum acts as a sink of Ca+ ions, which are released upon signalling from the transverse tubules.

  • Balance and Determining Equilibrium

    • One is oriented in the horizontal plane, whereas the other two are oriented in the vertical plane.
    • The anterior and posterior vertical canals are oriented at approximately 45 degrees relative to the sagittal plane .
    • As the head rotates in a plane parallel to the semicircular canal, the fluid lags, deflecting the cupula in the direction opposite to the head movement.
    • The movement of two canals within a plane results in information about the direction in which the head is moving, and activation of all six canals can give a very precise indication of head movement in three dimensions.

  • DNA Repair

    • These can be of two types: transitions or transversions.
    • Transversion substitution refers to a purine being replaced by a pyrimidine or vice versa; for example, cytosine, a pyrimidine, is replaced by adenine, a purine.

  • Body Plans

    • Radial symmetry describes an animal with an up-and-down orientation: any plane cut along its longitudinal axis through the organism produces equal halves, but not a definite right or left side.
    • The goat also has an upper and lower component to it, but a plane cut from front to back separates the animal into definite right and left sides.

  • Animal Characterization Based on Body Symmetry

    • Bilateral symmetry involves the division of the animal through a sagittal plane, resulting in two mirror-image, right and left halves, such as those of a butterfly, crab, or human body .
    • This monarch butterfly demonstrates bilateral symmetry down the sagittal plane, with the line of symmetry running from ventral to dorsal and dividing the body into two left and right halves.

  • Movement at Synovial Joints

    • Protraction is the anterior movement of a bone in the horizontal plane.
    • (a)–(b) Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion.
    • (e) Abduction and adduction are motions of the limbs, hand, fingers, or toes in the coronal (medial–lateral) plane of movement.

  • Phylum Annelida

    • In addition, these vessels are connected by transverse loops in every segment.

  • Digestive System: Small and Large Intestines

    • The colon, home to many bacteria or "intestinal flora" that aid in the digestive processes, can be divided into four regions: the ascending colon, the transverse colon, the descending colon, and the sigmoid colon.

  • Leaf Structure and Arrangment

    • Alternate leaves alternate on each side of the stem in a flat plane, and spiral leaves are arranged in a spiral along the stem.