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The ovules are attached to parts of the interior ovary walls called the placentae. Placental areas occur in various positions, corresponding to various parts of the carpels that make up the ovary. See Ovule#Location within the plant. An obturator is present in the ovary of some plants, near the micropyle of each ovule.
A trocar (or trochar) is a medical or veterinary device used in minimally invasive surgery. Trocars are typically made up of an awl (which may be metal or plastic with a pointed or tapered tip), a cannula (essentially a rigid hollow tube) and often a seal. [1] [2] Some trocars also include a valve mechanism to allow for insufflation.
Part of a trocar device A device used as a guide during tracheostomy tube insertion Palatal obturator , a dental prosthesis used to seal an opening in the palate, i.e. cleft palate
A palatal obturator is a prosthesis that totally occludes an opening such as an oronasal fistula (in the roof of the mouth). They are similar to dental retainers , but without the front wire. Palatal obturators are typically short-term prosthetics used to close defects of the hard/soft palate that may affect speech production or cause nasal ...
The obturator process is an anatomical feature on the pelvis of archosaurs. It is a raised area of the ischium bone of the pelvis. [1] It is the origin of muscles that attach to the femur and aid in running. These muscles are called M. pubo-ischio-femoralis externus 1 and 2 in crocodylians.
An obturator hernia is a type of hernia involving an intrusion into the obturator canal. The obturator nerve can be compressed in the obturator canal. [2] The obturator canal may be compressed during pregnancy and major traumatic injuries, causing obturator syndrome. [3]
So a trocar is defined as 'a seal (which may be sharpened metal or plastic), a tube and a seal', which makes little sense. My best guess is that by obturator, what is meant is a seal that can be opened (but then the seal on the other end must be openable) once the sharp part has penetrated the skin (or whatever).
Chloroplasts in leaf cells of the moss Mnium stellare. Plant anatomy or phytotomy is the general term for the study of the internal structure of plants.Originally, it included plant morphology, the description of the physical form and external structure of plants, but since the mid-20th century, plant anatomy has been considered a separate field referring only to internal plant structure.