Changes

==Composition==

==Composition==

Lymph has a similar composition to blood plasma however lymphatic capillaries are more permeable than blood capillaries to proteins and this means that lymph has a higher concentration of proteins.

Lymph has a similar composition to [[Plasma - WikiBlood|blood plasma]] and when initially formed lymph is a relatively colourless. Depending on where the lymph travels the lymph will contain different concentrations of [[Lymphocytes - WikiBlood|lymphocytes]], proteins and fats. The concentration of [[Lymphocytes - WikiBlood|lymphocytes]] is highest in lymph after it has passed through [[Lymph Nodes - Anatomy & Physiology|lymph nodes]], and lymph formed in the [[Alimentary - Anatomy & Physiology|alimentary tract]] has a high concentration of fats.

==Circulation==

==Circulation==

Lymph travels unidirectionally from tissue into the blood stream via lymphatic capillaries which join to form vessels and these then join to form ducts. As there is no central pump lymph is moved through the vessels via compression the the vessels by skeletal muscle contraction. All lymph passes through lymph nodes before it reenters the blood stream. Further details of the lymphatic vessels can be found [[Lymphatic Vessels - Anatomy & Physiology|''here'']].

Lymph travels unidirectionally from tissue into the blood stream via lymphatic capillaries which join to form vessels and these then join to form ducts. As there is no central pump lymph is moved through the vessels via compression the the vessels by skeletal muscle contraction. All lymph passes through lymph nodes before it reenters the blood stream. Further details of the lymphatic vessels can be found [[Lymphatic Vessels - Anatomy & Physiology|''here'']].