T-cells
lymphocytes
b-cells
Well the difference between identical twins is that they look the same and fraternal twins don't really look the same.
hope that helped
The statement 'the substance secreted by the mucous membranes is called mucus' is TRUE. It is a secretion that helps to maintain the health of epithelial tissues.
<h3>What is mucus?</h3>
Mucus is a type of secretion that helps to maintain the overall health of the epithelial tissues by removing harmful particles.
The harmful particles removed by the mucus include waste particles and pathogenic microorganisms (e.g., bacteria and viruses).
Mucus secreted by the mucous membrane functions as a barrier for the immune system that helps to maintain a healthy state.
Learn more about mucus here:
brainly.com/question/10238566
