Chapter 6 (Lymphatic system) Flashcards
Lymphatic system is made up of
organs, tissues (nodes), thin-walled vessels and fluids that are found through the entire body.
What is a chief function of the lymphatic system?
capture fluid (called lymph) that escapes from cells and tissues and return it to the bloodstream. maintains a balance of fluids in the body.
associated lymphoid organs also have an immune function
Producing lymphocytes and other white blood cells to fight infection.
Lymphoid organs (4)
adenoids, tonsils, spleen, thymus (in some cases appendix)
lymph nodes
filter lymphatic fluid, removing bacteria and foreign cells as well as making lymphocytes and other infection-fighting cells.
What would enlargement or tenderness of lymph nodes be?
infection
what does a mastectomy often include removal of?
lymphatic tissue from the armpit area
What does the nervous system consist of ?
Brain, spinal chord, nerve tissue
Subdivided into central and peripheral nervous systems
What transmits impulses that govern sensation, movement and thought. as well as controls the boys voluntary and involuntary activity?
Nervous system
Brain
coordinates body functions
spinal chord
transmits messages to and from the brain
nerves
transmits messages to and from central nervous system
What is the central nervous system (CNS) consisted of?
Brain and spinal chord
from what point to what point does the spinal cord go?
from the brain to the lumbar vertebrae
What is the reticular activating system?
key series of nerve pathways in the brain and is essentially responsible in keeping a person awake.
Peripheral nervous system (PNS)
consists of two types of nerves: sensory and motor
sensory nerves
pick up info from throughout the body and transmit it to the spinal cord and brain.
Motor nerves
carry messages from the brain to the body.
Autonomic nervous system
peripheral nervous system that controls involuntary motor function and affects digestion and heart rate. can be broken down into sympathetic and parasympathetic nervous systems
Sympathetic nervous system
fight or flight. engaged when the body is in crisis. causes heart to beat faster and lungs to breathe deeper and blood vessels to constrict.
Parasympathetic nervous system
engaged in times of relaxation, referred to as the feed or breed response.
parasympathetic tone
causes increased blood flow to the digestive tract and reproductive organs. can cause heart to slow and blood vessels to dilate.
when is sympathetic nervous system usually activated?
as a result of injury or illness
when blood vessels constrict it brings blood away from the
skin
being pale and sweaty is a result of
diaphoretic as a result of constricted blood vessels
