Immune system notes Flashcards
3 functions of lymphatic system:
- fluid recovery
- lipid absorption
- facilitating immune responses
5 components of lymphatic system:
- lymph
- cells
- lymphatic vessels
- primary lymphatic organs
- secondary lymphatic organs & tissues
similar to plasma but less protein
no RBC’s
LYMPH
CELLS- what are the lymphocytes and macrophages?
Lymphocytes- B cells, T cells, NK cells
APC’s
what 2 structures provide environment for stem cells to divide & mature into B and T lymphocytes?
- Bone marrow
2. Thymus
one of two primary lymphatic organs
makes all WBC’s (lymphocytes)
matures B lymphocytes
Bone marrow
one of two primary lymphatic organs
T lymphocytes mature here
Thymus gland
cells responsible for antibody mediated immune responses
2 types
B cells; 1. plasma cells 2. memory cells
cells responsible for cell mediated immune responses
4 types
T cells; 1. cytotoxic T cells
- Helper T cells
- Suppressor T cells
- Memory cells
Macrophages, Dendritic cells (mobile), Reticular cells (fixed) are what?
Antigen Presenting Cells (APCs)
what are the forces at work in the lymphatic vessels? (4)
- skeletal pump
- arterial pulses from surrounding arteries
- respiratory pump
- suction from subclavian veins
2 big lymphatic vessels that attach to subclavian vein:
- thoracic (left lymphatic) duct
2. right lymphatic duct
all lymphatic ______ have a layer of CT surrounding outside structures called the ___.
organs; capsule
the site where most immune responses occur
secondary lymphatic organs & tissues
a disease causing organism
pathogen
