1. Parts of the Blood: Blood Blood Cells Plasma Platelets
Fibrin & Clotting Factors
Erythrocytes
(red)
Leukocytes
(white)

2. Plasma Liquid part of the blood
Consists of water and dissolved substances such as salts, glucose, amino acids, hormones, vitamins, and waste products.

3. Fibrin
Insoluble proteins that form fibres at the site of an injury (the foundation of a blood clot)

4. Leukocyte (white blood cell)
Colourless cells that can produce antibodies and are able to move in and out of the vessels to the location of injury where they can surround and engulf foreign bodies

5. Erythrocyte (red blood cell)
Contains hemoglobin (pigment that is red with the presence of oxygen and blue in the absence) and is responsible for oxygen transport
Disk shaped and lack a nucleus

6. Platelets
A small disk of red tissue which has no nucleus, they play an important role in blood clotting as they release serotonin which causes vessels to constrict so bleeding is reduced