lymphatic system Flashcards
3 main parts of system
Vessels
Nodes
Organs
6 things you need to label
tonsil
thymus
diaphragm
spleen
lymph node
lymph vessels
baisic baisic what does it do
gets rid of excess water
organs of lymphatic system
tonsil
thymus
diaphragm
spleen
where does lymph come from
blood plasma
colour of lymph
clear
contains white blood cells
what does lymph contain
water, proteins, salts, lipids, white blood cells
primary function of system
drain and return interstital fluid to the blood, absorb and return lipids from digestive system to the blood
what does system filter
pathogens, damaged cells, cellular debris and cancerous cells
where are lymph vessels
mingled among blood capillaries
what do Lymphatic capillaries do
pick up the fluid that leaks into your tissues from your bloodstream and return it to your circulatory system
where is lymph formed
It is formed when the fluid that is in the gaps all drains into lymph capillaries
what cells can spread via lymph (problem)
Metastatic cancer cells can spread via lymph.
where are main lymph nodes
neck, armpits and groin areas
what do lymph nodes look like
sac-like structures
lymph organs
Thymus
Spleen
Tonsils
Bone Marrow
where is thymus located
in the neck
what does thymus produce
T-lymphocytes (t cells) for the immune system
what happens to thymus at puberty
becomes much smaller
when do you make most your T cells
in childhood
where is spleen
behind stomach
whats the largest lymphatic organ in the body
spleen
what do spleen hold
holds an emergency reserve of blood, containing white blood cells
function of spleen
Filter blood from damaged cells, cellular debris and pathogens.
holds emergency blood supply of erythrocytes + lymphocytes
how many tonsils do majority have
7
where are adenoid
located in the posterior wall of the upper part of the throat
what is adenoid
tonsil
pharyngeal tonsil
tonsils we always talk about name
palatine tonsils
where do you find palantine tonsils
found at the back of the mouth
where are lingual tonsils
located at the base of the tongue.
types of tonsils
adenoid
palatine
lingual
what do tonsils do
tonsils combat bacteria and viruses that enter your body through your mouth.
pressure changes in capillares
large hydrotatic
smaller osmotic
larger osmotic
how does lymph leave capillaries
osmosis
start of capillary
Hydrostatic pressure is higher than osmotic pressure
water and small soluble molecules are forced through the capillary walls, forming tissue fluid between the cells.
what is hydrostatic pressure
pressure pushing the fluid out favouring filtration, which is higher at the arterial end of the capillary.
what is Osmotic pressure
pressure pushing the fluid in favouring absorption, which is higher at the venous end of the capillary
what happens at aterial end of capillary
hydrostatic pressure is higher than osmotic pressure
how is tissue fluid formed
water and small soluble molecules are forced through the capillary walls
what does lymph not contain
Proteins and cells in the plasma are too large to be forced out
start of cell fluid making
Osmotic pressure of the blood is higher than the hydrostatic pressure, and so most of the water from tissue fluid moves back into the blood capillaries
how does cell fluid move
osmosis
venous end of capillary
remainder of the tissue fluid is returned to the blood, via lymph vessels.
what is tissue fluid
bathes the cells. Formed from plasma and blood glucose, amino acids, fatty acids, salts and oxgyeb.
how is tissue fluid formed
due to high hydrostatic pressure of the blood at the arteriole end of the capillary that pushes fluid out of the blood
how is lymph formed
tissue fluid
fatty stubstances
lymphocytes
