Update: We are now collecting Disclosures from all users who edit content. You will be prompted to update these when you next edit content or you can complete your disclosures at any time in your user profile. This has been reflected in an updated terms-of-use.

Blood

Last revised by Dr Daniel J Bell on 21 Jul 2021

Blood is a connective tissue usually found in a liquid phase; it comprises a fluid component called plasma (about 55% of the total volume), in which lies the cellular component, comprising several cell lineages, primarily the white blood cells, red blood cells and platelets. In an average adult male the total volume of blood is ~5.5 liters.

Plasma

Plasma is predominantly composed of water (about 90%) in which both organic substances (such as amino acids, proteins and glucose) and inorganic salts are dissolved. Its physiological pH is slightly basic: 7.4.

ADVERTISEMENT: Supporters see fewer/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.