Protective secretion of the mucous membranes; in the gut it lubricates the passage of food and protects the epithelial cells; in the nose and throat and lungs it can make it difficult for bacteria to penetrate the body through the epithelium.
You will also like...
Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..
The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..
Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..
The human body is capable of regulating growth and energy balance through various feedback mechanisms. Get to know the e..
One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..