Lymphatic System

Question 1

Body Fluids

Answer 1

Plasma in blood vessels

Interstitial fluid between cells

Question 2

Lymphatic system functions

Answer 2

Return leaked plasma (interstitial fluid) to blood stream

Scrren lymph

House lymphocytes

Transport Dietary lipids

Question 3

Flow of lymph

Answer 3

Lymphatic Capillaries

Lymphatic vessels

Lymph Nodes

Lymphatic Trunks

Lymphatic Ducts

Venous Circulation

One way system to heart

Mimics Veins

Question 4

Lymph Capillaries

Answer 4

Closed-ended tubes

Overlapping endothelial cells from one way flaps

Occur everywhere capillaries do (Not in BM, CNS, Avascular tissue)

Question 5

Lacteals

Answer 5

Specialized lymph capillaries in small intestine

Pick up interstitial flid, dietary lipids, and lipid soluble vitamins

GI lymph is called chyle

Question 6

Lymphatic Vessels

Answer 6

Receive lymph from capillaries

Valves prevent backflow in low pressure system

Resemble veins with 3 tunics (intima, media, externa)

2 types:

Afferent toward node

Efferent away

More afferent than efferent forcing lympg to slow down

Allowing processing of lymph

Question 7

Lymphatic Nodes 7

Answer 7

Cervical Nodes along internal jugular

Axillary node

Deep nodes (aorta and celiac trunk and mesenteric arteries)

Pericranial ring (base of head)

Tracheal Nodes

Inguinal Nodes

Femoral Nodes( along femoral vein)

Question 8

Lymphatic Ducts

Answer 8

• Return lymph to cardiovascular system
• Both Empty at the junction of the internal jugular and subclavian veins
• Right lymphatic Duct- upper right chest, right of head and right arm
• Thoracic duct- contains cisternal chyli

Question 9

Lymphatic Nodule Structure

Answer 9

Oval clusters of lymphatic tissue NOT covered with a capsule

Contain macrophages, DC, lymphocytes

Question 10

Lymphatic Nodules Locations

Answer 10

• Tonsils: Pharyngeal (adenoids) palatine and lingual
• Mucosa Associated Lymphoid Tissue (MALT): gastrointestinal, respiratory, genital, urinary

Question 11

Lymphatic Organ Structure

Answer 11

Surrounded by CT capsule

Contail macrophages, DC, lymphocytes

Question 12

Lymphatic Organs

Answer 12

Lymph Nodes

Thymus

Spleen

Question 13

Thymus

Answer 13

Shrinks after puberty filling with fat and CT

Cortex: Immature T cells

Medulla: Mature T cells

Question 14

Spleen

Which quadrant

White vs red

Answer 14

• Largest lymphatic organ
• Located in upper left quadrant
• White pulp:
  
  • Lymphocytes and macrophages
  • Monitors blood for antigens, initiates response
• Red pulp
  
  • Blood reservoir, stores platelets and iron
  • Hemolysis (eats old RBC and platelets)
  • Remove debris in blood

Question 15

Spleen receive blood from

Located

Contacts

Answer 15

• Receives blood from celiac trunk
• Located btw 9th and 11th ribs
• Contacts
  
  • stomach
  • Large intestine
  • Left kidney
  • Tail of pancreas
• Intraperitoneal
  
  • Suspended by messentery
  • Gastrolineal ligament, attaches hilus of spleen to stomach
  • Lienorenal ligament, attaches hilus to left kidney, passage of splenic vessels