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The stigma, together with the style and ovary (typically called the stigma-style-ovary system) comprises the pistil, which is part of the gynoecium or female reproductive organ of a plant. The stigma itself forms the distal portion of the style, or stylodia, and is composed of stigmatic papillae , the cells of which are receptive to pollen.
Stigma, originally referring to the visible marking of people considered inferior, has evolved in modern society into a social concept that applies to different groups or individuals based on certain characteristics such as socioeconomic status, culture, gender, race, religion or health status. Social stigma can take different forms and depends ...
Stigma of the human ovary: the follicle is about to burst. A stigma, also called macula pellucida, in mammalian reproductive anatomy, refers to the area of the ovarian surface where the Graafian follicle will burst through during ovulation and release the ovum. [1]
Stigma (anatomy), a small spot, mark, scar, or minute hole; Stigma (botany), part of the female reproductive part of a flower; Pterostigma, a cell in the outer wing of insects; Eyespot apparatus, or stigma, a light-detecting organelle in cells
Mental Health Stigma Is the Source of Resignation Stigma. In Shaffer’s experience, the suspicion and hostility toward people who walk away from work ultimately stem from false but widespread ...
A carpel has a similar function to a megasporophyll, but typically includes a stigma, and is fused, with ovules enclosed in the enlarged lower portion, the ovary. [22] In some basal angiosperm lineages, Degeneriaceae and Winteraceae, a carpel begins as a shallow cup where the ovules develop with laminar placentation, on the upper surface of the ...
The eyespot apparatus (or stigma) is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids. It allows the cells to sense light direction and intensity and respond to it, prompting the organism to either swim towards the light (positive phototaxis ...
“The brain changes, and it doesn’t recover when you just stop the drug because the brain has been actually changed,” Kreek explained. “The brain may get OK with time in some persons. But it’s hard to find a person who has completely normal brain function after a long cycle of opiate addiction, not without specific medication treatment.”