To explain this, it is necessary only to say that the projection from the membrane is covered by soft, conical processes, which are received into cavities of a corresponding size on the summit of the firm, mushroom-shaped cotyledon growing from the inner surface of the womb.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
Then the soft projection of the membrane, which is attached to the firm fungus-shaped cotyledon on the inner surface of the womb, is seized by the little finger, and the other fingers and thumb are closed on it so as to tear it out from its connections.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
2 illustrates the relation of the fetal and maternal parts of a cotyledon.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler