00:01
So, if we go through the structure of an ovum, we will see the following important layers and the ucite.
00:13
So, the ucite is composed of the nucleus and the cytoplasm, which is also known as the ooplasm.
00:21
Now, this cytoplasm is surrounded by a layer of vitaline membrane, followed by zona pellucida, and then the outermost layer is the corona radiata.
00:32
Now this zona pellucida is an important layer surrounding the ucied.
00:41
Now this zona pellucida is formed by the golgi bodies present in the cytoplasm of the ucide.
00:53
The layer zona pellucida is composed of proteins called glycoproteins.
01:03
The zona pellucida has two important functions which majorly takes part in fertilization.
01:13
So the first one is recognition of the sperm.
01:21
So there are three zona pellucida proteins which are known as zp1, zp2 and zp3.
01:30
All these proteins are responsible for recognition.
01:34
Of the species of the sperm.
01:39
So the zona pellucida will ensure that fertilization occurs only between the sperm and the ovum of the same species...