nictitating membrane A transparent fold of skin lying deep to the other eyelids at the mesial side, which may be drawn over the front of the eyeball. It is the so-called third eyelid, found in reptiles and birds generally and in many mammals...
This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..
Humans are capable of only one mode of reproduction, i.e. sexual reproduction. Haploid sex cells (gametes) are produced ..
Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..
Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..
If New Zealand has lots of unique animals, it's also got a whole lot of unique plants. Find out more about some of them,..
Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..
