| The ovary of many teleosts, especially viviparous ones, contains a permanent cavity, which is formed during ovarian development when an invagination of the ovarian surface traps a portion of the coelom. |
| As the red cell is not a phagocytic cell, it must be assumed that, prior to membrane invagination, considerable changes in the shape of the cell will have to take place. |
| After establishing a tight junction with the erythrocyte membrane, the merozoite actively enters into what looks like an invagination of the red cell membrane. |
| The chloroplasts of some plants show the invagination of the inner membrane into granum particularly in Sorghum, maize and sugarcane. |
| One major characteristic is the invagination of the epidermis in the equivalent of the dermis. |
| A slight invagination of the ectoderm occurs, and a cloacal membrane forms, separating the ectodermal invagination from the gut cavity. |
