Your baby's finally here, and you're thrilled â but you're also exhausted, uncomfortable, on an emotional roller coaster, and wondering whether you'll ever fit into your jeans again. Childbirth classes helped prepare you for giving birth, but you weren't prepared for all of this!
The trabeculae carneae are muscular, columnar protrusions found on the internal surface of the ventricles, the main pumping chambers of the heart. It is thought that they help prevent suction that would occur with a smooth surface.he trabeculae carneae are muscular, columnar protrusions found on the internal surface of the ventricles, the main pumping chambers of the heart. It is thought that they help prevent suction that would occur with a smooth surface.
Operculata. The operculum is not a product of the mantle. It is produced by a separate organ, the opercular disc, a pad of specialized secretory epithelial cells located right where the operculum is attached-on the posterior, dorsal aspect of the foot.perculata. The operculum is not a product of the mantle. It is produced by a separate organ, the opercular disc, a pad of specialized secretory epithelial cells located right where the operculum is attached-on the posterior, dorsal aspect of the foot.