The epithelium of the tubule consists of a type of sustentacular cells known as Sertoli cells, which are tall, columnar type cells that line the tubule. In between the Sertoli cells are spermatogenic cells, which differentiate through meiosis to sperm cells.Sertoli cells function to nourish the developing sperm cells. They secrete testis-determining factor, a binding protein which increases the concentration of testosterone inside the seminiferous tubules.he seminiferous tubules are formed from the testis cords that develop from the primitive gonadal cords, formed from the gonadal ridge. Seminiferous tubule (right) with sperm (black, tiny, ovoid).
Envy (from Latin invidia) is an emotion which occurs when a person lacks another's superior quality, achievement, or possession and either desires it or wishes that the other lacked it. Bertrand Russell said that envy was one of the most potent causes of unhappiness.
1 As iron is eaten by rust, so are the envious consumed by envy âLivy. 2  Envy hit him â¦ like lack of oxygen âWilliam Mcllvanney. ( 3 Fools may our scorn, not envy raise, for) envy is a kind of praise âJohn Gay.  Envy is like a fly that passes all a bodyâs sounder parts and dwells upon the sores âGeorge Chapman.