The iliac crest is easily palpated from the bodyâs exterior, making it an easily identifiable landmark. The iliac crest also lends itself to bone grafting and bone marrow transplants thanks to its proximity to the bodyâs surface and the large amount of bone tissue and red bone marrow found in the ilium.
Ecosystems have an atmosphere, soil, light, heat, water and living  organisms. The living organisms in an ecosystem can include plants,  animals or both.it is formed by livi â¦ ng non living thing.ll ecosystems must have a producer. A producer is a plant that can make its own energy (autotrophic). Th â¦ en, primary consumers eat the producer, taking 10% of the energy produced in the previous organism for itself. This is a small ecosystem, but an ecosystem nonetheless.
Grasslands include the prairies (the Great Plains and Argentina's pampas), the steppes, and the savanna, which is a mostly dry ecosystem composed of tall grasses.Grasslands can be grassy swamps as well, such as in the Florida Everglades.rasslands include the prairies (the Great Plains and Argentina's pampas), the steppes, and the savanna, which is a mostly dry ecosystem composed of tall grasses.