| Question |
Answer |
| Lymphatic System | =Lymph
=Lymphatic vessels
=Lymphatic tissue
=Lymphatic nodules
=Lymph nodes
=Tonsils
=Spleen
=Thymus
|
| Lymphatic Vessels | --Carry lymph away from tissues
-Lymphatic capillaries
*More permeable than blood capillaries
*Epithelium functions as series of one-way valves
|
| Functions of the Lymphatic System | Fluid balance
Excess interstitial fluid enters lymphatic capillaries + becomes lymph
Fat abs.
Abs, of fat + other substances frm digestive tract
Defense
Microorganisms + other foreign substances are filtered from lymph by lymph nod + frm blood by spl |
| Lymphatic Vessels | Carry lymph away from tissues
-Lymphatic capillaries=
*More permeable than blood capillaries
*Epithelium functions as series of one-way valves
Lymphatic capillaries join to form Lymphatic vessels
*Have valves that ensure one-way flow
|
| Lymphatic Vessels II | Lymph nodes: Distributed along vessels and filter lymph
Lymphatic trunks: Jugular, subclavian, bronchomediastinal, intestinal, lumbar
Lymphatic ducts: Right and thoracic which connect to large veins
|
| Lymphatic Tissue and Nodules | -Lymphatic tissue
*Consists mainly of lymphocytes
*Encapsulated or not
-Lymphatic nodules
*Numerous in loose connective tissue of digestive (Peyer’s patches), respiratory, urinary, reproductive systems
|
| Tonsils | -Large groups of lymphatic nodules in nasopharynx and oral cavity
-Provide protection against bacteria and other harmful material
Groups
*Palatine
*Pharyngeal
*Lingual
|
| Lymph Nodes | Organized in cortex and medulla
Substances removed by phagocytosis or stimulate lymphocytes or both
Only structures to filter lymph
**Afferent and efferent vessels
|
| Spleen | -Can be ruptured in traumatic abdominal injuries resulting in bleeding, shock, death
-Blood flows through at 3 different rates
Fast (most), slow, intermediate
-Functions:
Destroys defective RBCs
Detects + responds 2 foreign subst
-reservoir for bld |
| Thymus | -Located in superior mediastinum
-Divisions: Cortex and medulla
-Site of maturation of T cells
|
HHS Shrek
