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The embryo is surrounded by the thin membranes of the amniotic sac, the umbilical cord is seen in the center, attaching the embryo to the placenta. The umbilical cord develops from and contains remnants of the yolk sac and allantois. It forms by the fifth week of development, replacing the yolk sac as the source of nutrients for the embryo. [2]
Diagram of an anther in cross section. 1: Filament; 2: Theca; 3: Connective (the conducting vessels in red); 4: Pollen sac (also called sporangium) The androecium is one of the fertile cycles of flowers. The parts that make up the androecium are called stamens whose function is the generation of male gametophytes or pollen grains.
File:Hibiscus stigma anther.jpg Anthers and Stigma of Hibiscus. Photograph by Nikhil N. Reason A high resolution image of the anthers and stigmas. Anthers and Stigma are part of the essential whorls of a flower. Anthers form the male reproductive organs, Stamens. Whereas stigma are part of the carpels which are the female reproductive organs.
A stylized image of the hibiscus flower was used as a logo of Air Polynésie. Nigerian author Chimamanda Ngozi Adichie named her first novel Purple Hibiscus after the delicate flower. The bark of the hibiscus contains strong bast fibres that can be obtained by letting the stripped bark set in the sea to let the organic material rot away ...
The floral axis (sometimes referred to as the receptacle) is the area of the flower upon which the reproductive organs and other ancillary organs are attached. It is also the point at the center of a floral diagram. Many flowers in division Angiosperma appear on floral axes. The floral axis can differ in form depending on the type of plant.
Donald Trump blamed Gavin Newsom for “apocalyptic” wildfires raging in southern California on Wednesday, but the governor's office hit back at the president-elect and accused him of "playing ...
The developing fetus is connected to the placenta via an umbilical cord. Mammalian placentas can be classified based on the number of tissues separating the maternal from the fetal blood. These include: endotheliochorial placentation In this type of placentation, the chorionic villi are in contact with the endothelium of maternal blood vessels.