Body Planes / Body Cavities hste I
|Body Planes / Body Cavities
Body Planes – Imaginary lines drawn through body to separate body into sections. Directional terms created by planes. Three main body planes:
Transverse Plane – Horizontal plane, divides body into top half and bottom half.
Superior – body parts above
Inferior – body parts below
Midsagittal (median) Plane – Divides body into right and left sides.
Medial – body parts close to midline
Lateral – body parts away form midline
Frontal or Coronal Plane – Divides body into front section and back section
Ventral or Anterior – Body parts in front of plane or in front of body
Dorsal or Posterior – Body parts in back of plane or in back of body
Directional Terms for Extremities in Relation to Trunk (point of reference)
Proximal – Body parts close point of reference
Distal – Body parts distant from point of reference
Example – Relationship between wrist, elbow, and shoulder with shoulder being point of reference
wrist is distal to elbow
elbow is proximal to shoulder
Body Cavities – Spaces within body that contain vital organs. Two main body cavities:
Dorsal Cavity – One long, continuous cavity located on back of body. Divided into to two sections:
Cranial Cavity – contains the brain
Spinal Cavity – contains the spinal cord
Ventral Cavities – Larger than dorsal cavity, separated into two cavities by diaphragm
Thoracic Cavity – located in chest and contains heart, lungs, and large blood vessels.
Abdominal Cavity – divided into upper and lower part.
Upper Abdominal Cavity – contains stomach, small intestine, most of large intestine, liver, gallbladder, pancreas, and spleen.
Lower Abdominal Cavity or Pelvic Cavity – contains urinary bladder, reproductive organs, and last part of large intestine
Three Small Cavities
Orbital Cavity – contains eyes
Nasal Cavity – contains nose structures
Buccal – contains mouth
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