GEN BIO 2 -- L1

• BODY SYMMETRY refers to the repetition of the parts in an orderly fashion.
• RADIAL SYMMETRY has radial lines that radiate from a central point.
• ASYMMETRIC - cannot be divided
• BILATERAL - mirror image, can be divided into HALF
• RADIAL SYMMETRY - repeated among the central axis
• directional terms describe the position of structures relative to other locations in the body
• SUPERIOR (CRANIAL) - toward head, upper part
• INFERIOR (CAUDAL) - away from head, lower part
• VENTRAL (ANTERIOR)- front or forward
• DORSAL (POSTERIOR)- back or rearward
• LATERAL - sides
• PROXIMAL - close to the point of attachment
• DISTAL - farther from point of attachment or origin
• MEDIAL - midline
• SUPERFICIAL - closer to the surface (external)
• DEEP - farther from the surface (INTERNAL)
• BODY PLANES AND SECTION

  1. coronal/ frontal plane
  2. sagital/ lateral plane
  3. axial/ transverse plane
• SAGITTAL PLANE - divides body into right and left sides
• CORONAL / FRONTAL PLANE - divides body into anterior and posterior portions
• TRANSVERSE PLANE - divides body into superior and inferior parts
• frontal plane, also known as "coronal", divides the body into anterior and posterior (front and back, side to side)
• sagittal or lateral plane divides the body from left to right