(1) Anatomy 101 - Chapter 1 Flashcards
● Science that deals with the form and structure of all organisms
● Literally means to cut apart
Anatomy
○ Study of the form and relations (relative positions) of the structures of the body that can be seen with the unaided
Gross (macroscopic) Anatomy
○ Study of the structures of various species of animals, with particular emphasis on those characteristics that aid in classification
Comparative anatomy
○ Study of developmental anatomy, covering the period from conception to birth
Embryology
○ Study of tissues and cells that can be seen only with the aid of a microscope
Histology (microscopic anatomy)
○ Deals with portions of cells and tissues as they are visualized with the aid of the electron microscope
Ultrastructural cytology
a term frequently used in reference to structures seen in electron micrographs
Fine structure
○ A study of anatomy through a systematic approach
Systemic anatomy
suffix added to the root word referring to the system to name the study
-ology (branch of knowledge or science)
Practical Names?
○ Function (i.e. adductor muscle of the thigh)
○ Position relative to other similar structure (i.e. superficial inguinal ring)
○ Location (i.e. infraorbital foramen)
○ Appearance or form (i.e. greater curvature of the stomach
○ Relate the structure to a person, usually the person who first described the structure (e.g. canal of Schlemm)
Eponymous names
Because eponyms are useless from a practical standpoint, what ? discourages their use
Nomina Anatomica Veterinaria
towards the head
Cranial
towards the tail
Caudal
are directional terms used in reference to features of the head
Rostral and caudal
toward the nose
rostral
an imaginary plane passing through the body so as to divide the body into equal right and left halves
Median plane
any plane parallel to the median plane
Sagittal plane
The median plane is sometimes called the?
midsagittal plane
at right angles to the median plane and divides the body into cranial and caudal segments
Transverse plane
○ At right angles to both the median plane and transverse planes
○ Divides the body into dorsal (upper) and ventral (lower) segments
Horizontal plane
adjective meaning close to or toward the median plane
Medial
means away from the median plane
Lateral
toward or beyond the backbone or vertebral column
Dorsal
the noun referring to the dorsal portion or back
Dorsum
away from the vertebral column or toward the midabdominal wall
Ventral
indicate proximity to the center of an anatomical structure
Deep and internal
refer to proximity to the surface of the body
Superficial and external
relatively close to a given part, usually the vertebral column, body or center of gravity. Generally used in reference to an extremity of limb
Proximal
farther from the vertebral column, and generally used in reference to portions of an extremity
Distal
suffix used to form an adverb from any of the named directional terms, indicating movement in the direction of or toward
-ad
refers to the flexor or caudal surface when describing the thoracic limb (forelimb)
Palmar
refers to the caudal surface when describing the pelvic limb (hindlimb)
Plantar
used in reference to the digits to mean toward the functional axis of the limb
Axial
decreases the angle of a joint, as when the elbow or finger is bent
Flexion
increases the angle of a joint, as when the elbow or finger is straightened
Extension
extends a joint beyond a linear or straight configuration, so that the angle of the joint is extended beyond 180 degrees
Hyperextension (dorsiflexion)
moves a body part toward the median plane, as when a limb is tucked under the body
Adduction
moves a body part away from the median plane, as when a limb is pulled to the side
Abduction
moves a structure cranially or rostrally, or moves it away from the central body, a when the tongue is projected from the mouth
Protraction
moves a structure back toward the body, as when the tongue is replaced in the mouth
Retraction
moves a structure dorsally, as when the shoulder is shrugged or the eyelid is opened
Elevation
moves a structure ventrally, as when the eyelid is closed
Depression
rotates the pelvic limb so that the plantar/caudal surface faces medially (similar to supination)
Inversion
rotates the pelvic limb so that the plantar/caudal surface faces laterally or caudally (similar to pronation)
Eversion
describes an essentially circular movement of a part (rather than a joint) around its long axis, as when the head of the humerus rotates in the glenoid cavity of the scapula
Rotation
described a combined movement, involving both flexion/extension and abduction/adduction.
Circumduction
refers to a position in which the dorsal aspect of the body or any extremity is uppermost
Prone
refers to the act of turning toward a prone position
Pronation
refers to the position in which the ventral aspect of the body or palmar or plantar aspect of an extremity is uppermost
Supine
refers to the act of turning toward a supine position
Supination
smallest, basic unit of life that is responsible for all of life’s processes
Cells
Cells three main parts:
○ Cytoplasm
○ Nucleus
○ Cell membrane
group of specialized cells
Tissue
made up by cells that specialize in holding structures
Connective tissue
group of tissues that work together for overall function
Organs
group of organs that participate in a common enterprise
Organ system
cover the surface of the body, line body cavities and form glands
Epithelial tissues
support and bind other tissues together and from which the formed elements of the blood are derived (bone marrow)
Connective tissues
specialize in contracting
Muscle tissues
conduct impulses from one part of the body to another
Nervous tissues
Epithelial Tissues
● Classified as?
simple (composed of single-layer) or stratified (many layered)
● Classified as simple (composed of single-layer) or stratified (many layered)
● Further subdivided according to the shape of the individual cells within it
○ Squamous - platelike
○ Cuboidal - cubic
○ Columnar - cylindrical
○ Pseudostratified columnar
Epithelial Tissues
○ Consists of thin, platelike cells
○ Much expanded in two directions but have little thickness
○ The edges are joined somewhat like a mosaic tile covering a floor
○ A layer of this tissue has little tensile strength and is found only as a covering layer for stronger tissues
○ Found where a smooth surface is required to reduce friction
○ e.g. covering of viscera and the linings of body cavities and blood vessels
Simple squamous epithelium
○ Approximately equal in all dimensions
○ Found in some ducts and in passageways in the kidneys
Cuboidal epithelial cells
○ Cylindrical
○ Arranged somewhat like the cells in a honeycomb
○ Some have whiplike projections called cilia extending from the free extremity
Columnar epithelial
Columnar epithelial
○ Cylindrical
○ Arranged somewhat like the cells in a honeycomb
○ Some have whiplike projections called ? extending from the free extremity
cilia