Tissue fluid

Question 1

Plasma is

Answer 1

is a straw-coloured liquid that constitutes around 55% of the blood

Question 2

Plasma is largely composed of water (95%) and because water is a good solvent, many substances can be ………….

which allow….

Answer 2

can dissolve in it, allowing them to be transported around the body

Question 3

How is tissue fluid made

Answer 3

As blood passes through capillaries, some plasma leaks out through gaps in the walls of the capillary to surround the cells of the body

Question 4

The composition of plasma and tissue fluid are virtually the same, although tissue fluid contains far fewer …………

why

Answer 4

The composition of plasma and tissue fluid are virtually the same, although tissue fluid contains far fewer proteins

Proteins are too large to fit through gaps in the capillary walls and so remain in the blood

Question 5

Tissue fluid bathes almost all the cells of the body outside of the circulatory system
Exchange of substances between cells and the blood occurs via the tissue fluid

For example, carbon dioxide produced in aerobic respiration will leave a cell, dissolve into the tissue fluid surrounding it, and then diffuse into the capillary