Lesson 9 - Tissue fluid and lymph Flashcards
(19 cards)
meaning tissue fluid
the fluid that surrounds all the cells in the body
meaning oncotic pressure
the tendency for water to move into the capillaries by osmosis
meaning hydrostatic pressure
the residual pressure from the heartbeat that is still present as the blood enters the arterial end of the capillary beds, and tends to force fluid out through the leaky capillary walls
meaning lymph capillaries
the blind tubes that carry the lymph away from the tissues
meaning lymph
the fluid that travels in the lymphatic system
meaning lymph glands
the glands in the lymph system that contain lymphocytes that make antibodies
what are the 2 factors involved in controlling the movement of the tissue fluid
- water potential
- hydrostatic pressure
how doe water potential affect the movement of the tissue fluid in and out of the capillaries
large plasma proteins in the blood cause an osmotic affect, resulting in the blood inside the capillaries to have a large water potential than the tissue fluid surrounding the capillaries. Thus, the water is moved into the blood via osmosis
how do you calculate oncotic pressure
water potential inside the capillary - water potential outside the capillary
what is the function of hydrostatic pressure on the movement of tissue fluid
the hydrostatic pressure forcing water out is higher than the oncotic pressure moving water in. So, water is squeezed out of the capillaries, and fill the spaces around all the cells, resulting in tissue fluid.
what does tissue fluid contain
water, oxygen, glucose, etc.
what does tissue fluid not contain
large plasma proteins and erythrocytes
why does hydrostatic pressure fall
- pressure from the pulse is lost
- the fluid moves out of the capillaries to form tissue fluid, decreasing the volume inside the capillaries
when hydrostatic pressure falls, why does oncotic pressure remain high
due to the constant presence of the large plasma proteins
what happens when hydrostatic pressure is greater than oncotic pressure
fluid leaves the capillaries and tissue fluid is formed
what happens when hydrostatic pressure is lower than oncotic pressure
fluid moves into the capillaries, and tissue fluid is lost
how much % of tissue fluid does not return into the capillaries
10 %
why does some tissue fluid not return to the capillaries
the tissue fluid is drained into lymph capillaries, and becomes lymph.
where is lymph transported to
to the neck area, where it joins to the left and right subclavian veins that are found under the collar bone
