<h3>Earthworms are extremely beneficial in agriculture. They aid in the following ways:</h3>
- They help loosen up and aerate the soil as they burrow deep. This aids in the respiration of the roots of the plants, making them penetrate deeper and grow well
- They are being used presently in vermiculture to produce high-quality manure
- They are also used as baits to catch fish
- They keep interchanging the topsoil with the layer just below, thereby increasing soil fertility.
- The excreta of earthworms is rich in the nitrogenous matter and is required for plant growth
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Animals includes only multicellular heterotrophs
Water is one agent of weathering. Once a rock has been broken down, a process called erosion transports the bits of rock and mineral away.
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.