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Dissection Terminology

Dissection Terminology. Zoology 2011-2012 Wakefield. Anterior – means in front of. Pertaining to the front or head end; Aka – cephalic or cranial. Posterior. Pertaining to the tail or hind end. Dorsal. Referring to the back or uppermost side. Ventral.

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Dissection Terminology

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  1. Dissection Terminology Zoology 2011-2012 Wakefield

  2. Anterior – means in front of • Pertaining to the front or head end; • Aka – cephalic or cranial

  3. Posterior • Pertaining to the tail or hind end

  4. Dorsal • Referring to the back or uppermost side

  5. Ventral • Referring to the belly side of the body

  6. Lateral • Pertaining to the side of the body; situated to either side of the midline

  7. Medial • At or near the middle or midline of a body or organ, in contrast to lateral

  8. Cephalic (cranial) • Pertaining to the head end – the opposite of caudal

  9. Caudal • Pertaining to the tail end

  10. Proximal • Toward or near the point of attachment – the opposite of distal

  11. Distal • Away from the base or point of attachment – opposite of Proximal

  12. Longitudinal • Pertaining to the long axis of the body ; lengthwise

  13. Peripheral • Refers to parts away from the center or external to

  14. Superficial • On or near the surface

  15. Oral • Pertaining to the mouth or the region around the mouth

  16. Aboral • Pertaining to a region away from or most distant from the mouth

  17. Planes / Sections • Longitudinal Plane – Pertaining to the long axis of the body; lengthwise • Sagital Section – Longitudinal section through the median vertical plane that bisects the body into right and left halves; or any section parallel to it. • Frontal Section / Coronal Section – Longitudinal section made at right angles to a sagital section. It is parallel to the dorsal and ventral surfaces. • Median Plane – extends from the dorsal to the ventral surface & passes from the anterior end to the posterior end through the middle of the body – produces the saggital section. • Transverse Plane – Any section made through and at right angles to the longitudinal axis

  18. Planes / Sections • Parasagittal Section – Section to one side of the midline, separating right and left portions of unequal size

  19. Anatomical Directions & Axes

  20. Anatomical Directions & Axes

  21. Anatomical Directions & Axes

  22. Planes of Body

  23. Directional Terminology

  24. Body Symmetry of Animals

  25. Bilateral Symmetry:a single plane divides body into two mirror images

  26. Radial Symmetry:can be cut in half along many planes that allow for nearly identical halves

  27. Asymmetrycannot be divided into mirror images

  28. What type of symmetry do each of the following exhibit?

  29. 1.

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  35. 8.

  36. 9.

  37. 10.

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