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Body Organization &
Terminology
Planes Coronal (Frontal)
Divides the body into anterior/posterior parts
Transverse (Horizontal or Axial)Separates into both superior(upper)/inferior parts(lower)
SagittalDivides the body into right and left portions.
MidSagittal (Median)Extends vertically. Divides the body into right and left halves
Anatomic Directional Terms
Body Regions
Anterior Regions of Body
Inferior to the thorax (chest) and superior to the hipbones?
Abdominal Region
Portion of the upper limb between the elbow and wrist?
Forearm (Antebrachium)
Front of the elbow
Antecubital
What is the depression on the anterior surface of the elbow?
Antecubital fossa
Portion of the upper limb between the shoulder and the elbow?
Brachium, Brachial Region
Armpit = Axilla, Axillary Region
Cheek = Buccal, Buccal Region
Wrist = Carpus, Carpal Region
Head = Cephalic Region
Neck = Cervix, Cervical Region
Fingers or Toes = Digits
Thumb 1
Index Finger 2
Middle Finger 3
Ring Finger 4
Pinky 5
Portion of the cranium overlying the frontal bone?
Forehead, Frontal Region
Big toe = Great Toe, Hallux
The anterior region where a fold is created as the torso meets the thigh?
Groin, Inguinal Region
Small of the back = Lumbar Region
Naval = Umbilicus
Surrounds the nipple on the anterior thorax
Mammary Region
Chin = Mental Region (Chin is more commonly used)
Portion of the face associated with the nose
Nasal Region
Mouth = Oral Cavity
The region of the face associated with the eye
Orbital Region
The anterior portion of the hand formed by the metacarpals
Palm
Anterior portion of the fingers = Palmar Aspect
The region overlying the kneecap
Patellar Region
Thumb = Pollex (commonly called thumb or first digit)
The region associated with the pelvis
Pelvic Region
The region between the pubic symphysis, the coccyx, and the ischial tuberosities?
Perineum, Perineal Region
Foot = Pes (commonly called the foot)
Superior portion of the foot = Dorsum, Dorsal Region
Sole of the foot = Plantar Surface
Area overlying the pubic bones = Pubic Region
Area superficial to the shoulder blade = Scapular Region
Anterior thoracic region on the midline = Sternal region
Chest = Thoracic Region
Posterior Regions of Body
Dorsum of the body from the base of the neck to the end of the spine?
Back, Dorsum, Dorsal Region
Portion of the lower limb from the hip to the knee?
Thigh, Femoral Region
Portion of the lower limb from the knee to the ankle?
Leg or Crural Region
Region of the pelvis associated with the large, posterior, hip muscles?
Buttocks, Gluteal Region
The region at the posterior base of the head
Occipital Region
Posterior portion of the fingers = Dorsum, Dorsal Aspect
Area on the posterior aspect of the knee = Popliteal Region
Area superficial to the sacrum = Sacral Region
Braincase = Cranium, Cranial Region
The body is split up into two main areas, the axial and appendicular regions. The axial region refers to
the head, vertebral column and trunk.
The appendicular region refers to the pelvic girdles and the upper and lower limbs. Each area is further divided into descriptive
regions.
Body Cavities
Posterior (Dorsal) AspectThe small cavity at the back of the body which houses the
Cranial and Vertebral Cavities.
Cranial Cavity (upper) (Holds the brain)
Bounded by the skull
Contains Brain and Meninges.
Vertebral Canal (lower)Bounded by vertebral column, intervertebral discs and surrounding ligaments.
Contains Spinal Cord and Spinal Nerve Roots.
Ventral CavityArises from a space called the coelom that forms during
embryonic development
Thoracic Cavity (Large cavity above diaphragm)
Bound Laterally by the ribs (covered by costal pleura) and the diaphragm inferiorly (covered by diaphragmatic pleura)
Contains Heart, Lungs, Trachea, Oesophagus, Large Blood Vessels, and Nerves.
Abdominal Cavity (Large cavity below diaphragm)
Contains gastrointestinal tract, spleen, kidneys and adrenal glands.
Bound superiorly by the diaphragm, laterally by the body wall, and inferiorly by the pelvic cavity.
Ventral CavityPelvic Cavity (Small cavity below the brim of the pelvis)
Bounded superiorly by the abdominal cavity, posteriorly by the sacrum, and laterally by the pelvis.
Contains urinary bladder, genitals, sigmoid colon and rectum.
Body MembranesMembrane that lines the ventral cavity
Serous membranes
Layer that adheres to the internal surface of the body wall
Parietal Layer
Layer that adheres to the external surface of the internal organs
Visceral Layer
Space between the two layers lining the ventral cavity
Serous Cavity (Lubrication)
Space within the thoracic cavity
Mediastinum
Serous membrane that surrounds the heart
Pericardium
What portion forms the sac surrounding the heart?
Parietal Pericardium
What portion forms the heart’s external surface?
Visceral Pericardium
Space that surrounds the heart
Pericardial Cavity
Serous membrane associated with the lungs, what portion adheres to the internal thoracic wall?
Pleural Membrane
What portion adheres to the internal thoracic wall?
Parietal Pleura
What portion adheres directly to the lungs?
Visceral Pleura
Space between the lungs and the thoracic wall
Pleural Cavity
Membrane that lines the abdominopelvic cavity
Peritoneum
Portion of the membrane that lines the internal walls of the cavity
Parietal Peritoneum
Portion of the membrane that ensheathes the external surfaces of most digestive organs
Visceral Peritoneum
Space that lies between the two layers of the membrane lining this cavity
Peritoneal Cavity
Four Quadrants
Six Regions of Abdomen