It's an ear drum with a hole over towards one edge.
6-8 wweks
yes
A perforated septum is not serious.
Another name for a eardrum can be called a Tympanic membrane.
perforated metal is stronger
The man had a perforated bowel which spilled infection into his peritoneal cavity.
Non-perforated mean no holes in the object or something like that
can you go on a simulated sky dive with a perforated ear drum
Marginal net benefits= Marginal benefit- Marginal cost
You can purchase perforated metal sheet online at onlinemetals.com. This website offers a large selection of perforated metal sheest to choose from.
The nucleus.In a eukaryotic cell, the nucleus is more or less spherical, and surrounded by a double membrane perforated by pores that allow large molecules through. Inside the nucleus are the chromosomes, each of which has either one or (after DNA replication) two molecules of DNA.
Spontaneous repair of a perforated tympanic membrane may be hindered by persistent infection or inflammation of the ear, inadequate blood supply to the area, underlying medical conditions like diabetes or autoimmune disorders, and repeated trauma to the ear. In these cases, medical intervention such as tympanoplasty surgery may be necessary to facilitate proper healing of the perforation.