The ischial spine does not contribute to the boundaries of the pelvic outlet.
The pelvis is the lower part of the trunk of the human body present between the thighs and abdomen or the embedded skeleton in it. The pelvis has the main function of providing support for the intestine and contains reproductive organs and the bladder.
The space enclosed by the lower circumference of the lesser pelvis is called the pelvic outlet and is irregular structure. The boundaries of pelvic outlet are: pubic arch, the tip of coccyx, inferior margin of sacrotuberous ligament and the ischial tuberosities.
Ischial spine is an eminence or outgrowth triangular in shape and provides attachment to different internal and external structures.
Pollination is very important. It leads to the creation of new seeds that grow into new plants.
But how does pollination work? Well, it all begins in the flower. Flowering plants have several different parts that are important in pollination. Flowers have male parts called stamens that produce a sticky powder called pollen. Flowers also have a female part called the pistil. The top of the pistil is called the stigma, and is often sticky. Seeds are made at the base of the pistil, in the ovule.
To be pollinated, pollen must be moved from a stamen to the stigma. When pollen from a plant's stamen is transferred to that same plant's stigma, it is called self-pollination. When pollen from a plant's stamen is transferred to a different plant's stigma, it is called cross-pollination. Cross-pollination produces stronger plants. The plants must be of the same species. For example, only pollen from a daisy can pollinate another daisy. Pollen from a rose or an apple tree would not work.
But how does pollen from one plant get moved to another?
Cells need a source of energy, they get this energy by breaking down food molecules to release, the stored chemical energy.