4The Lymphatic System System of tissues and vessels Scattered throughout the bodyServices almost all regions
5Functions of the Lymphatic System Learning OutcomeList the functions of the lymphatic system.
6Functions of the Lymphatic System Three Main FunctionsFluid balance (lymph)Protection from infectionAbsorption of fats
7Functions of the Lymphatic System ✓Functions of the Lymphatic SystemCheckpoint 16-1 What are the three functions of the lymphatic system?7
8Lymphatic Circulation Learning OutcomesExplain how lymphatic capillaries differ from blood capillaries.Name the two main lymphatic ducts and describe the area drained by each.
9Lymphatic Circulation One-way systemBegins in tissuesEnds in bloodstream
10Figure 16-1 The lymphatic system in relation to the cardiovascular system. What type of blood vesselreceives lymph collectedfrom the body?
11Lymphatic Circulation Lymphatic CapillariesCapillary walls (endothelium) are flattened epithelial cells.They are more permeable than blood capillaries.Overlapping cells form one-way valves.They arise blindly (closed at one end).Lacteals absorb digested fats.
12Figure 16-2 Lymphatic drainage in the tissues. 12
13Lymphatic Circulation Lymphatic VesselsSuperficial and deep setsRight lymphatic ductThoracic duct (left lymphatic duct)Cisterna chyli
14Figure 16-3 Vessels and nodes of the lymphatic system. What are some nodesthat receive lymphdrainage from thebreast?14
15Lymphatic Circulation Movement of LymphMovement of lymph toward heart caused by:Valves in lymphatic vesselsContraction of lymphatic vesselsSkeletal muscle contractionBreathing
17Lymphatic Circulation ✓Lymphatic CirculationCheckpoints 16-2 What are the two differences between blood capillaries and lymphatic capillaries? 16-3 What are the two main lymphatic vessels?17
18Lymphatic Circulation ?Lymphatic CirculationPop Quiz 16.1 Which of the following is NOT characteristic of lymphatic vessels? A) They have thin walls. B) They are blind-ended. C) They can contract to propel lymph. D) They transport lymph to the tissues.
19Lymphatic Circulation ?Lymphatic CirculationPop Quiz Answer 16.1 Which of the following is NOT characteristic of lymphatic vessels? A) They have thin walls. B) They are blind-ended. C) They can contract to propel lymph. D) They transport lymph to the tissues.
20Lymphoid Tissue Learning Outcome List the major structures of the lymphatic system and give the locations and functions of each.
21Lymphoid Tissue Distributed throughout the body Makes up specialized organs of lymphatic system
24Figure 16-3 Vessels and nodes of the lymphatic system. What are some nodesthat receive lymphdrainage from thebreast?24
25Figure 16-4 Lymph nodes.What type of lymphatic vessel carries lymph into a node?What type of lymphatic vessel carries lymph out of a node?25
26Lymphoid Tissue The Spleen Cleanses blood Filtration Phagocytosis Destroys old red blood cellsProduces red blood cells before birthIs a reservoir for blood
27Lymphoid Tissue The Thymus Plays a key role in early immune system developmentProduces thymosinDevelops T-lymphocyte cellsPromotes lymphocyte growthPromotes lymphoid tissue activityShrinks after puberty
28Lymphoid Tissue The Tonsils Remove contaminants and trap pathogens Palatine tonsilsPharyngeal tonsil (adenoids)Lingual tonsilsSurgery to treat if recurrent infection or enlarged tonsils make swallowing or breathing difficult
32✓Lymphoid TissueCheckpoints 16-4 What is the function of the lymph nodes? 16-5 What is filtered by the spleen? 16-6 What kind of immune system cells develop in the thymus? 16-7 What is the general location of the tonsils?32
33?Lymphoid TissuePop Quiz 16.2 Lymph from the arm and breast passes through which of the following? A) Inguinal nodes B) Cervical nodes C) Axillary nodes D) Tracheobronchial nodes
34?Lymphoid TissuePop Quiz Answer 16.2 Lymph from the arm and breast passes through which of the following? A) Inguinal nodes B) Cervical nodes C) Axillary nodes D) Tracheobronchial nodes
35Disorders of the Lymphatic System Learning OutcomeDescribe the major lymphatic system disorders.
36Disorders of the Lymphatic System and Lymphoid Tissue Disorders Related to InfectionLymphadenopathyLymphadenitisInfectious mononucleosisLymphedemaElephantiasis
42Disorders of the Lymphatic System and Lymphoid Tissue ✓Disorders of the Lymphatic System and Lymphoid TissueCheckpoints 16-8 What is lymphadenopathy? 16-9 What is lymphoma and what are the two examples of malignant lymphoma?42
43Disorders of the Lymphatic System and Lymphoid Tissue ?Disorders of the Lymphatic System and Lymphoid TissuePop Quiz 16.3 What is Hodgkin lymphoma? A) A benign tumor of the lymph nodes B) A malignant tumor of the lymph nodes C) A benign tumor of the spleen D) A malignant tumor of the spleen
44Disorders of the Lymphatic System and Lymphoid Tissue ?Disorders of the Lymphatic System and Lymphoid TissuePop Quiz Answer 16.3 What is Hodgkin lymphoma? A) A benign tumor of the lymph nodes B) A malignant tumor of the lymph nodes C) A benign tumor of the spleen D) A malignant tumor of the spleen
45Case Study Learning Outcome 6. Describe the spleen’s functions and the consequences of its removal.45
46Case Study Functions of the Spleen Filters blood Removes worn-out old blood cellsActs as a large lymph node, detecting and fighting disease-causing organismsConsequences of SplenectomyLiver will take over blood filtration and RBC removalGreater risk of infection
47Word Anatomy Learning Outcome Show how word parts are used to build words related to the lymphatic system.47
48Word Anatomy Word Part Meaning Example -oid like, resembling Lymphoid tissue makes up the specialized organs of the lymphatic system.aden/oglandThe adenoids are gland-like tonsils.lingu/otongueThe lingual tonsils are at the back of the tongue.-pathyany diseaseLymphadenopathy is any disease of the lymph nodes.-megalyexcessive enlargementSplenomegaly is excessive enlargement of the spleen.