Spongy tissues composed of microscopic cells in which inhaled air exchanged for carbon dioxide during one breathing cycle are lungs.
Gaseous exchange is the delivery of oxygen from the lungs to the blood stream, and the elimination of carbon dioxide from the bloodstream to the lungs. It takes place in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
Answer:
The cranium
Explanation:
The cranium is the upper part of the skull that is made up of eight bones that do not move, which serves as protection for the delicate brain structure in humans. The cranium bones are named according to the area of the brain they serve as protection to these are: the sphenoid bone, the ethmoid bone, the occipital bone, the two temporal bones, the frontal bone, and the two parietal bones, making eight in number.
The occipital bone protects the occipital lobe; the parietal bones protects the parietal lobe of the brain; and the frontal bone protects the frontal lobe of the brain.
Answer: The majority of animals on our planet, about 95 percent, do not possess a true backbone and are called invertebrates. It's common knowledge that vertebrates like humans have a complex nervous system that reacts to stimuli, but much less is known about invertebrates like shrimp and insects. While it's somewhat different from that of vertebrates, shrimp do have a central nervous system comprised of four main parts.
Explanation:
When Charles Darwin stepped ashore on the Galapagos Islands in September 1835, it was the start of five weeks that would change the world of science, although he did not know it at the time. Among other finds, he observed and collected the variety of small birds that inhabited the islands, but he did not realize their significance, and failed to keep good records of his specimens and where they were collected.
Answer:
Polysaccharides are an important class of biological polymers. Their function in living organisms is usually performed one of two functions: energy storage or structural support. Starch and glycogen are highly compact polymers that are used for energy storage.
Explanation:
