IMPORTANT!

The mammalian circulatory system is a closed double

circulation system

WHY?

BLOOD PRESSURE VARIATION

BLOOD PLASMA AND TISSUE FLUID Tissue fluid is almost identical in composition

to blood, except…

Tissue fluid contains far less proteins (which are too large to escape from capillaries)

Tissue fluid does not contain red blood cells

FORMATION AND RETURN OF TISSUE FLUID

LYMPH About 90% of the fluid that leaks from

capillaries returns to them

The remainig 10% is collected by a series of tubes called lymph vessels or lymphatics.

Lymphatics contain tiny valves, which allow large molecule of proteins to pass through.

Lymph nodes: involved in protection against disease.

BLOOD Blood is a tissue formed by plasma and three

different kinds of cells.

SOME USEFUL LINKS Blood pressure

https://cnx.org/contents/A4QcTJ6a@3/Blood-Flow-Blood-Pressure-and-

Tissue fluid and lymphhttps://www.youtube.com/watch?v=IQIPrQUo1D4

Composition of the blood http://www.slideshare.net/vidhidoshi9619/blood-38779086