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2.03 Structures of the Lymphatic System.pptx
- 1. 2.03 Remember the structures of the lymphatic system
- 2. 2.03 Remember the structures of the lymphatic system What are the structures of the lymphatic system? 2.03 Remember the stuctures of the lymphatic system 2
- 3. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system Lymph fluid Lymph vessels Lymph nodes Lymph glands 3
- 4. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 4 Lymph – straw-colored fluid that leaves capillary and goes into tissue spaces. • Similar to plasma • Aka interstitial fluid • Carries the nutrients, oxygen and hormones to cells • Carries waste back to capillaries
- 5. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 5 Lymph vessels - transport excess lymph fluid back to circulatory system. • Located in almost all tissues and organs • Closely parallel veins • Since the lymphatic system has no pump, skeletal muscle contractions moves lymph through the vessels • Valves prevent backward flow • Only move in one directions (from body towards heart)
- 6. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 6 Lymph vessels parallel to blood vessels
- 7. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 7 Lymph vessels • Lacteals • Specialized lymph vessels in the small intestines that absorbs digested fat
- 8. Structures of the lymphatic system 8 Lymph vessels - • Lymph vessels join together to form larger lymph vessels • Large lymph vessels join together to form lymphatics • Two main lymphatics: • Thoracic duct • Also called the left lymphatic duct • Receives lymph from the left side of chest, head, arm and neck, the entire abdominal area and entire lower body • Dumps back into left subclavian SVC • Right lymphatic duct • Receives lymph from the right side of the chest, head, arm and neck • Dumps back into right subclavian SVC
- 9. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 9 Lymph nodes • Tiny, oval-shaped structures! • Range in size from a pinhead to an almond • Site of lymphocyte formation and filter for screening out harmful substances (ex: bacteria, cancer) • If substances can’t be destroyed, node becomes inflamed Lymph node
- 10. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 10 Lymph nodes • Where are lymph nodes located?
- 11. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 11 Tonsils – masses of lymphatic tissue that produce lymphocytes and filter bacteria • 3 pairs • Palatine tonsils: sides of throat • Adenoids / Pharyngeal tonsils: upper throat • Lingual tonsils: back of tongue
- 12. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 12 Say “aahhh” Why this is helpful?
- 13. Structures of the lymphatic system 13 Spleen • Sac-like mass of lymphatic tissue • LARGEST lymphatic structure • Located in the LUQ – just below diaphragm • Forms lymphocytes and monocytes • Filters blood • Stores large amounts of RBCs – contracts during vigorous exercise or loss of blood to release RBCs • Destroys or removes old or fragile RBCs – preserves hemoglobin
- 14. 2.03 Remember the stuctures of the lymphatic system Thymus gland • Located in the upper, anterior thorax (chest), above the heart • Produces T lymphocytes • Also an endocrine gland because also secretes hormones 14 Structures of the lymphatic system
- 15. 2.03 Remember the stuctures of the lymphatic system Structures of the lymphatic system 15
- 16. 2.03 Remember the structures of the lymphatic system What are the structures of the lymphatic system? 2.03 Remember the stuctures of the lymphatic system 16
Editor's Notes
- Aka intercellular fluid and tissue fluid Water, lymphocytes, granulocytes, oxygen, nutrients, co2. NO rbc’s or proteins.
- ***LYMPHATIC STRUCTURES THAT CLOSELY PARALLEL VEINS ARE CALLED = LYMPH VESSELS Not in hair and nails
- ***LYMPHATIC VESSEL THAT COLLECTS LYMPH FROM LEFT CHEST, ABDOMEN AND LOWER LIMBS = THORACIC DUCT
- ***TINY OVAL SHAPED LYMPH STRUCTURES LOCATED THROUGHOUT BODY = LYMPH NODES Adentitis – inflamed nodes. The two primary types of lymphocytes are B lymphocytes and T lymphocytes, or B cells and T cells. Both originate from stem cells in the bone marrow and are initially similar in appearance. Some lymphocytes migrate to the thymus, where they mature into T cells; others remain in the bone marrow, where—in humans—they develop into B cells.
- All throughout the body Also behind knee
- they get smaller in size as person gets older ADENOIDS – soft palate middle Not located along lymph vessels. That’s why theyre not nodes.
- Have students look in someone else’s mouth they say aaahhh. See what happens. Then trade why is this helpful. Helps you see.
- ***LARGEST LYMPH STRUCTURE = SPLEEN ***LYMPHATIC STRUCTURE LOCATED IN LUQ OF ABD IS = SPLEEN Bone marrow really forms. Spleen mostly stores though it does “maintain hemopoeitic capabilities” according to one source.
- Lymphocytes mature here Hormones that help person develop healthy immune system Largest at puberty, then atrophies throughout life