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Insects do not have lungs; oxygen and other gases, such as carbon dioxide, pass through their exoskeleton via tiny valves called spiracles. Insects also lack closed blood vessels ; instead, they have a long, thin, perforated tube along the top of the body (called the "dorsal aorta") that functions like a heart, and pumps haemolymph toward the ...
Insects are a source of protein in many parts of the world. [13] In parts of Africa, up to 50% of dietary protein derives from insects. [13] It is estimated that more than 2 billion people eat insects daily. [14] Meat, dairy, eggs, soybeans, fish, whole grains, and cereals are sources of protein. [11]
Africa is the world's second-largest and second-most populous continent after Asia.At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surface area. [9]
"Mangroves to Mountains - a field guide to the Native Plants of the Logan-Albert River Catchment"; Logan River branch SGAP. (Qld Region) Inc, 2002; ISBN 1-875401-95-4 "Mangroves to Mountains Volume 2 - a field guide to the Native Plants of South-east Queensland"; Logan River branch SGAP (Qld Region) Inc, 2005; ISBN 0-646-45089-1
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