Biology 121 - Lymphatic System Flashcards
Thymus
Mature
Specific Immunity
Adaptive defences
humoral immunity - B cell
Cellular Immunity - T cell
Components of the Lymphatic system
- Immune Cell
- Lymph
- Lymph vessels
- Other lymphatic organs and tissues
Lymphatic Capillaries
blind-ended vessels that weave between tissue cells and blood capillaries
Flow of lymph
always runs parallel to the systemic system
flows through special tubes from tissues to large veins and heart.
absorption
process by which nutrients pass into the bloodstream
Lymph vessels
- ability to resist infections and disease
- immune system comprises all body cells and tissue involved in production of immunity
- immune system has two arms
- non-specific defences (innate)
- specific defences (adaptive)
Lymph
connective fluid
Lymph Tissues
Blood plasma (from capillaries)
interstitial/ tissue fluid
lymphatic capillary (lymph)
lymph vessels, trunks and ducts (lymph)
blood plasma (vein at base of neck)
Spleen
filters blood
removes worn out or defective RBCs, WBCs and platelets
Stores and releases blood and blood cells
Initiating immune responses by B and T cells
Tonsils
Connective tissues dominated by lymphocytes
surrounded the opening to the respiratory tract
five tonsils
filter air
Red Bone marrow
produced
Cutaneous sensation
receives information
What are the lymphatic system Functions?
- Drains excess fluid and proteins from the tissue back to the blood circulation.
- Transports fat and vitamins from gut to liver (digestion)
- Defends the body against external and internal threats (immunity/ resistance to diseases
Nonspecific immunity
Innate defences
surface barriers - skin, mucous membrane
internal defences - what we are born with
