Many of the systems we encounter in the body have the same description. We often use such terms interchangeably. Not until we know the definitions do we use them correctly. In this section, we will deal with two such terms, namely production and output, which are often used interchangeably.
Both of these processes involve physical movement of material. However, the difference between excretion and excretion is the removal of waste from the body, and excretion is the movement of substances within the body. The column of the table below gives the difference between excretion and excretion.
Difference Between Secretion and Excretion
| Secretion | Excretion |
| Secretion is a process of movement of materials internally – such as hormonal secretion, mucosal secretion, lubrication protection, etc. | Excretion is the process of waste removal from the body |
| Materials like hormones, enzymes and saliva are secreted in the body. | Materials like carbon dioxide, sweat, tears, faeces and urine are excreted out |
| It is an active process | It is a passive process |
| The secreted substances are involved in the metabolism of the body | The excreted substances are no longer of use to the body they are eliminated from the body |
| Endocrine glands, digestive glands, salivary glands, liver, pancreas and gallbladder are involved in the process of secretion | Lungs, skin, tear ducts and rectum are involved in the process of excretion |
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