A/P 2 Ch.21 Lymphatics
Trace the path of lymph from the time it leaves the interstitial spaces to the time it enters the blood
1. Lymphatic capillaries 2. Afferent lymphatic vessels 3.Lymph nodes 4.Efferent lymphatic vessels 5.Lymphatic trunks 6.Lymphatic ducts
Approximately____of the fluid that enters the interstitial space is normally absorbed into lymphatic capillaries
15%
Prokaryotic
Bacteria
The spleen functions to filter
Blood
Lymph from the right lymphatic duct drains which areas of the body?
Right side of the head and neck Right upper limb Right side if thorax
Thymus
Site of T-lymphocyte maturation
The thymus continues to grow until a person reaches ________ , when it reaches a maximum weight of 30 to 50 grams.
puberty
B and T-lymphocytes both mature in the red bone marrow
False
Lymphatic nodules are encapsulated lymphatic organs.
False
Lymphatic nodules are small, oval clusters of lymphatic cells that are completely surrounded by a connective tissue capsule.
False
Secondary lymphatic structures include the red bone marrow and thymus
False
Spleen
Filters blood, storage of platelets and erythrocytes
Lymph node
Filters lymph
Eukaryotic
Fungi Protozoans Multicellular parasites
The formation of lymph increases as a result of
Increasing hydrostatic pressure in tissue fluid
Select all that are true of prions.
They spread through infected meat They are responsible for mad cow disease
T-lymphocytes are named according to the __________ gland where they become immunologically mature.
Thymus
Which lymphatic system organ involutes and becomes nonfunctional as aging occurs?
Thymus
Lymphatic vessels are similar to veins in that they contain valves to prevent backflow, and use the contraction of nearby skeletal muscles to help move lymph along
True
Under an electron microscope, an infectious agent is identified that is not cellular. This must be a
Virus
Acelllar
Viruses Prions
The majority of lymph is composed of
Water and dissolved solutes
Pharyngeal tonsils are
also called adenoids.
Occasionally lymph can contain metastisized
Cancer cells
Lymphatic capillaries are found in all of the following tissues or areas EXCEPT
Epithelia
Lymph vessels reabsorb what fluid from the tissues and return it to the venous circulation
Interstitial fluid
What are the anatomic characteristics of lymphatic vessels?
Larger diameter than blood capillaries Lack of basement membrane Blind-ended Have anchoring filaments
The right lymphatic duct receives lymph from all of the following body regions, except the
Lower limb
Correct Flow Direction
Lymphatic capillaries to collecting vessels Collecting vessels to lymphatic trunks Left Lumbar trunk to the thoracic duct Lower extremity lymph to the thoracic duct
The white pulp of the spleen contains
Lymphatic cells
What are the typical structural parts of a lymph node?
Lymphatic nodules Afferent and efferent lymphatic vessels Cortex and medulla of a nodule
Cells in a lymph node that engulf and destroy damaged cells, foreign substances, and cellular debris are
Macrophages
The red pulp of the spleen contains
Macrophages
What are the main groups of tonsils in the body? Check all that apply.
Pharyngeal Palatine Lingual
Other than red bone marrow, the spleen contains the largest single store of
Platelets
Which of the following is not a function of the lymph node?
Production of red blood cells
In an adult, where is red bone marrow found in the body?
Proximal epiphyses of each humerus and femur Vertebrae and ribs Flat bones of the skull and sternum
The primary functions of lymph include
Returning proteins to the bloodstream and transporting foreign particles to the lymph nodes
The_________serves as a reservoir for platelets
The red pulp