Ch. 1 and Ch. 3: The Human Body An Orientation Flashcards
Tissue
Group of similar cells that have a common function. (4 basic tissue: epithelium, muscle, connective and nervous tissue).
Organ
A discrete structure composed of at least two tissue types (4 is more common) that performs a specific function for the body.
Each organ of the body as a specialized functional center responsible for necessary activity that no other organ can perform.
Organ system
Organs that work together to accomplish a common purpose.
Anatomical position
The anatomical reference point is a standard body position.
Axial region
Makes up the main axial of our body, includes the head, neck and trunk.
Appendicular region
consists of the appendages, or limbs, which are attached to the body’s axis.
Superior (cranial)
Toward the head end or upper part of a structure or the body; above.
Inferior (caudal)
Away from the head end or toward the lower part of a structure or the body; below.
Medial
Toward or at the midline of the body; on the inner side of.
The heart is medial to the arm.
Lateral
Away from the midline of the body; on the outer side of..
The arms are lateral to the chest.
Proximal
Closer to the origin of the body part or the point of attachment of a limb to the body trunk.
(The elbow is proximal to the wrist.)
Distal
Farther from the origin of the body part or the point of attachment of a limb to the body trunk.
(The elbow is proximal to the wrist.)
Transverse (horizontal plane)
aka. horizontal plane - runs horizontally from right to the left, dividing the body into superior and inferiors parts.
(aka. cross-section.)
Cross section
aka. Transverse/ horizontal plane.
Sagital plane
is a vertical plane that divides the body into right and left parts.
Median (midsagittal plane)
A sagittal plane that lies exactly in the midline is the median plane or midsagittal plane.
Parasagittal plane
All other sagittal planes, offset from the midline.
Oblique section
Cuts made diagonally between the horizontal and the horizontal and vertical planes. Because oblique sections are often confusing and difficult to interpret, they are seldom used.
Dorsal body cavity
Which protects the fragile nervous system organs, has two subdivisions.
Ventral body cavity
The more anterior and larger of the closed body cavities is the.
Viscera
The ventral body cavity houses internal organs collectively or visceral organs.
Thoracic cavity
The superior subdivision, is surrounded by the ribs and muscles of the chest.
Abdominolpelvic cavity
The thoracic cavity is separated from the more inferior, by the diaphragm, a dome-shaped muscle important in breathing.
It has two parts; these regions are not physically separated by a muscular or membrane wall.
Pleural cavity
The thoracic cavity is further subdivided into lateral (XX). Each enveloping a lung. and the medial (XX)