Presentation on theme: "Body Planes Anatomic reference systems describe the location and functions of body parts. The basic reference systems are: body planes, body directions,"— Presentation transcript:
1Body PlanesAnatomic reference systems describe the location and functions of body parts. The basic reference systems are: body planes, body directions, body cavities, and structural unitsBody planes are imaginary horizontal and vertical lines used to divide the body into sectionsThe use of these planes makes it easier to describe the location of an organ or problem.
2Midline and Bilateral Symetery The midline, also known as the midsagittal plane, is a vertical plane that divides the body, into equal left and right halves.
3Transverse PlaneThe transverse plane, also known as the horizontal plane, divides the body into superior (upper) and inferior (lower) portions.
4Ventral and DorsalVentral refers to the front or belly side of the body.Dorsal refers to the back of the body.
5Superior and InferiorSuperior means uppermost, above or toward the head. For example, the lungs are located superior to (above) the diaphragm.Inferior means lowermost, below or toward the feet. For example, the stomach is located inferior to (below) the diaphragm.
6Body Cavities Dorsal Cavity Ventral Cavity Terms Related to Abdominal Cavity
8Body CavitiesThe dorsal cavity contains the structure of the nervous system that coordinate the bodily functions.The dorsal cavity is divided into the cranial cavity, which contains the brain, and the spinal cavity, which contains the spinal cord.The ventral cavity contains the body organs that maintain homeostasis. Homeostasis means maintaining a constant internal environment.The ventral cavity is divided into three parts: thoracic, abdominal, and pelvic cavities.
9Divisions of the Spinal Cord Cervical vertebrae: CThoracic vertebrae: TLumbar vertebrae: LSacrum: SSpinal column or spinal cordDisk (slipped disk)FLASH MOVIE -- CLICK
11Mucous Membranes Lines all body cavities that open to the exterior Line the digestive, respiratory, urinary and reproductive systemsLoose connective tissue underneathOften adapted for secretion ex. Line the stomachSlide 4.4
13Synovial Membranes Connective Tissue have membranes Lines fibrous capsules surrounding jointsBursitis is inflammation of membranes and sacs in the kneeFigure 4.2Slide 4.7
14Basic Features of the Nervous System Meninges:The three layers of tissue that encase the central nervous system; the dura mater, arachnoid membrane, and the pia mater.Dura mater: Outermost, tough and flexible.Arachnoid membrane:Middle layer located between the dura mater and pia mater.Pia mater:Innermost layer of the meninges that clings to the surface of the brain; thin and delicate.
15[Blood vessels and Cerebrospinal Fluid (CSF)] Dura MaterArachnoid MembraneSubarachnoid Space[Blood vessels and Cerebrospinal Fluid (CSF)]Pia MaterNervous System Tissue Brain, spinal cord, cranial nerves, spinal nerves, peripheral ganglia