A standardized body posture used as a reference point for all anatomical descriptions, characterized by an upright stance, feet slightly apart, palms facing forward, and thumbs pointing away from the body.
Without a consistent anatomical position, directional terms like 'superior' or 'lateral' would be ambiguous and lead to confusion when describing locations or movements.
Card 2
Sagittal Plane
Answer
An imaginary vertical plane that divides the body or an organ into right and left parts.
A midsagittal plane specifically divides the body into equal right and left halves, while parasagittal planes divide it into unequal halves.
Card 3
Frontal (Coronal) Plane
Answer
An imaginary vertical plane that divides the body or an organ into anterior (front) and posterior (back) parts.
Think of a 'crown' (corona) placed on the head; a coronal plane runs from side to side like a headband.
Card 4
Transverse (Horizontal) Plane
Answer
An imaginary horizontal plane that divides the body or an organ into superior (upper) and inferior (lower) parts.
This plane is often used in medical imaging (like CT scans) to view cross-sections of the body.
Card 5
Superior (Cranial)
Answer
Towards the head end or upper part of a structure or the body; above.
The term 'cranial' specifically refers to the head, making it a good synonym for superior when referring to structures within the head or trunk.
Card 6
Inferior (Caudal)
Answer
Away from the head end or toward the lower part of a structure or the body; below.
The term 'caudal' specifically refers to the tail end, which in humans is the coccyx or lowest part of the spinal column.
Card 7
Anterior (Ventral)
Answer
Towards or at the front of the body; in front of.
The 'ventral' side of the body typically houses the major visceral organs, derived from the embryonic ventral cavity.
Card 8
Posterior (Dorsal)
Answer
Towards or at the back of the body; behind.
The 'dorsal' side of the body typically refers to the back, as in the dorsal fin of a fish.
Card 9
Medial
Answer
Towards or at the midline of the body; on the inner side of.
The nose is medial to the ears, meaning it is closer to the body's central axis.
Card 10
Lateral
Answer
Away from the midline of the body; on the outer side of.
The ears are lateral to the nose, meaning they are further from the body's central axis.
Card 11
Proximal
Answer
Closer to the origin of the body part or the point of attachment of a limb to the body trunk.
This term is primarily used for structures on the limbs; the elbow is proximal to the wrist.
Card 12
Distal
Answer
Farther from the origin of a body part or the point of attachment of a limb to the body trunk.
This term is primarily used for structures on the limbs; the wrist is distal to the elbow.
Card 13
Superficial (External)
Answer
Towards or at the body surface.
A superficial wound affects only the skin layers, not deeper tissues.
Card 14
Deep (Internal)
Answer
Away from the body surface; more internal.
Muscles are deep to the skin, meaning they are located beneath it.
Card 15
Ipsilateral
Answer
On the same side of the body.
If a stroke affects the right side of the brain and causes weakness in the right arm, the symptoms are ipsilateral to the brain injury.
Card 16
Contralateral
Answer
On opposite sides of the body.
Most sensory and motor pathways in the brain are contralateral; for example, the right side of the brain controls the left side of the body.
Card 17
Origin (Muscle)
Answer
The attachment of a muscle that remains relatively fixed or less movable during muscle contraction.
The origin is typically more proximal or closer to the axial skeleton, providing a stable anchor for movement.
Card 18
Insertion (Muscle)
Answer
The attachment of a muscle that moves during muscle contraction.
The insertion is typically more distal or further from the axial skeleton, and it is pulled toward the origin when the muscle shortens.
Card 19
Foramen Magnum
Answer
The large opening in the inferior part of the occipital bone of the skull, through which the brainstem connects with the spinal cord.
This landmark is crucial for the passage and protection of the central nervous system structures between the brain and the rest of the body.
Card 20
Greater Trochanter
Answer
A large, irregular, quadrilateral eminence located at the junction of the neck and shaft of the femur, serving as an attachment point for several hip muscles.
This prominent skeletal landmark is palpable on the lateral aspect of the hip and is a key site for muscle attachments that abduct and rotate the thigh.
Card 21
Olecranon Fossa
Answer
A deep triangular depression on the posterior surface of the distal humerus, which accommodates the olecranon process of the ulna during elbow extension.
This fossa allows the elbow joint to fully extend, preventing hyperextension by the bony articulation of the ulna within it.
Card 22
Medial Epicondyle (Humerus)
Answer
A prominent bony projection on the medial side of the distal humerus, serving as a common origin for many forearm flexor muscles.
Injury to this area, often called 'golfer's elbow,' indicates inflammation of the tendons of the muscles originating here due to repetitive wrist flexion.
Card 23
Acromion
Answer
The lateral, flattened, and most superior process of the scapular spine, forming the highest part of the shoulder and articulating with the clavicle.
The acromion forms the acromioclavicular (AC) joint and provides an attachment point for the deltoid and trapezius muscles, shaping the shoulder contour.
Card 24
Coracoid Process
Answer
A small, hook-like bony projection from the superior anterior portion of the scapula, serving as an attachment site for several muscles and ligaments.
This process is vital for shoulder stability and provides origin for the short head of the biceps brachii and coracobrachialis muscles, and insertion for the pectoralis minor.
Card 25
Deltoid Tuberosity
Answer
A roughened, V-shaped area located on the lateral aspect of the mid-shaft of the humerus, serving as the insertion point for the deltoid muscle.
This landmark is critical for shoulder abduction, as the powerful deltoid muscle exerts its primary force here to lift the arm.
Card 26
Xiphoid Process
Answer
The smallest and most inferior part of the sternum (breastbone), typically cartilaginous in youth and ossified in adults, serving as an attachment for the diaphragm and rectus abdominis muscles.
This landmark is important in CPR, as pressure applied directly to it can cause damage to underlying organs like the liver.
Card 27
Stomach Location
Answer
Located primarily in the left upper quadrant of the abdominopelvic cavity, inferior to the diaphragm and partially covered by the liver and spleen.
Its position allows it to receive food from the esophagus superiorly and pass partially digested food to the small intestine inferiorly.
Card 28
Liver Location
Answer
The largest internal organ, situated predominantly in the right upper quadrant of the abdominopelvic cavity, inferior to the diaphragm and deep to the ribs.
Its superior position beneath the diaphragm and posterior to the lower ribs provides some protection, while its size dictates its presence across the midline.
Card 29
Heart Location
Answer
Located in the mediastinum, a central compartment of the thoracic cavity, posterior to the sternum, anterior to the vertebral column, and superior to the diaphragm, with its apex pointing slightly left.
This protected central location allows it to efficiently pump blood throughout the body, shielded by the rib cage and sternum.
Card 30
Kidneys Location
Answer
A pair of retroperitoneal organs located on the posterior abdominal wall, lateral to the vertebral column, extending roughly from the T12 to L3 vertebral levels.
Their retroperitoneal position means they lie behind the peritoneum, making them accessible from the back without entering the peritoneal cavity.