Answer: this is called passive transport and it does not require energy.
The abdominal cavity does not have a bony protection. The abdominal cavity is barely an unfilled space. It comprises a quantity of critical body organs containing the subordinate portion of the esophagus, the stomach, the small intestine, the colon, the rectum, the liver, the gall bladder, pancreas, spleen, kidneys, and bladder.
Air masses that are formed over land are called maritime tropical air mass
<span>microtubules and microfilaments </span>
