Make a drawing of the aboral surface showing all these parts.
They show also some variety in the form and appearance of the shell, but not anything like the degree of variety shown by the shells of the Gastropods.
When first hatched the young oyster swims freely by means of its cilia; after a few days it attaches itself to some solid object and grows truly oyster-like.
After a while it comes to rest on the ocean-floor or on some rock or shell, attaches itself, and begins to take on the form and character of the parent.
The folds which thus fix the oesophagus form a series of cells, above each of which it attaches itself, and supports an arm or tentaculum.
It attaches itself chiefly to rocks beaten by the waves and exposed to view at the moment of reflux.
We may say the same thing of the fish which, through idleness, attaches itself, like the remora, to a neighbour who swims well, and fishes by his side without fatiguing his own fins.
Aboral (or basal) The disk by means of which a free polyp disk attaches itself to external objects.
Tentacles soon sprout out from one end of the embryo's body and a mouth is formed; the column becomes more slender and attaches itself by the aboral pole to some solid object.
The embryo fluke gains admission to the sheep's body through the instrumentality of small snails, to the shells of which it attaches itself.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "attaches itself" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
