00:02
Okay, so various phylogenetic trees based on regulatory, molecular regulatory proteins, pointed out similarity between vertebrates and invertebrate muscle tissue, leading us to speculate that these two tissues might share evolutionary relationships.
00:20
The general consensus is that vertebrate muscle tissue has evolved from invertebrate muscle tissue, owing to the fact that vertebrates, apart from sharing a similar musculature, have additional layers of, specialized muscles.
00:34
For example, invertebrates have three classes of muscle tissue.
00:37
They're strutored muscles, smooth muscle, and non -muscles.
00:40
In vertebrates, there are four classes of muscle tissue.
00:43
They are to show skeletal, fast, skeletal, cardiac, and smooth muscles.
00:49
So the actin of the adult acidian is most similar to skeletal muscle actin of vertebrates that is to other types of muscle act...