Your blood is made up of liquid and solids. The liquid part, called plasma, is made of water, salts, and protein. Over half of your blood is plasma. The solid part of your blood contains red blood cells, white blood cells, and platelets.

Blood

Sweat

Tears are produced in the lacrimal glands (tear ducts) that are in the outer corners of your eyelids. These glands produce tears from your blood plasma, selecting some components but not others. The basic components of tears are:

Water
Electrolytes (sodium, potassium, chloride, bicarbonate, magnesium, and calcium). These are what give tears their salty taste.
Proteins (lysozyme, lactoferrin, lipocalin, and IgA). The tears have only about one-tenth of the protein of the blood plasma.
Lipids
Mucins

Tears

Sweating is the release of liquid from the body's sweat glands. This liquid contains salt. This process is also called perspiration. Sweating helps your body stay cool. Sweat is commonly found under the arms, on the feet, and on the palms of the hands.