This helps with buoyancy and balance. When they breathe-only through their nostrils, they can exchange 90% of the air in their lungs with each breath, compared to a human who only exchanges about 10% of their air. They may need to breathe every 30 seconds during strenuous activity but can stay submerged for up to 20 minutes. Their muscles lack the density of myoglobin (muscle hemoglobin) that is typical of other diving mammals. This trait contributes to their relatively short (8-15 minute) and shallow (10-20 feet) dives compared to seals and dolphins, however they do swim like dolphins and seals in a dorsoventral fashion as opposed to side to
American Intercontinental University Unit 1 Individual Project SCIE210 June 16, 2013 According to Briney, Amanda (2013), “A coral reef is a submerged structure made up of many different corals, or small marine invertebrates”. Some people think that coral reefs are a plant or an object like a rock. Coral is actually animals that have a hard exoskeleton. Their exoskeleton is what makes coral reefs look strong and rock like. Coral reefs come in many different sizes and shapes.
SO what the killer whale does it dives in the water and become submerged in the water for more than 15 minutes so they can use echolocation and listen where their prey is 3. Another selective pressure is the pressure that increases as they dive. Unlike human scuba divers, a whale doesn’t breathe air under pressure. It inhales only at the surface. Furthermore, in diving mammals, the alveoli collapse at about 3 atmospheres of pressure (about 90 feet), forcing air into the bronchioles (rigid air passages), a region where gases are not exchanged.
These little fellows are found higher in the intertidal area. Watch for them in tide pools, under rocks, and under clumps of seaweed. They're very common here. Lower in the intertidal, you'll see the granular hermit crab (Pagurus granosimanus). It has red or orange antennae, lacks hair, and its claws seem rough or grainy.
Once they’ve hatched, the young look like miniature adults. Where as spawn of an amphibian is aquatic larva. Enclosed by a soft gel exterior making them substantial prey for underwater hunters. Amphibians spend the first part of their life in water. There for they’re born with gills and go through metamorphosis to grow lungs and limbs.
A good example of where a large surface area is used for a fast rate of diffusion is in the alveoli of the lungs. Alveoli are the ‘air sacs’ at the end of the airways in the lungs where the exchange of carbon dioxide and oxygen takes place between the air in the alveoli and the blood in capillaries. Both the alveoli and the capillaries are extremely thin, only one cell thick, which increases the rate of diffusion, but the alveoli also have an extremely large surface area. This is because they take the shape of small spheres, giving them a large surface area to volume ratio. Another example of where surface area is maximised to increase the rate of diffusion is in the small intestine.
While I was doing research, I identified the species I found. The primary producers were Nori Seaweed, Black Pine, and Coral Weed. The sessile consumers consisted of Mussels, Acorn Barnacles, and Goose Neck Barnacles. The mobile consumers happen to be Whelks, Chiton, Starfish, and Green Crabs and they
“Beaked whales live in all the oceans”(Wursig 258), but some of the beaked whales “species live in the deep waters” (Wursig 258). Beaked whales nourishmostly on several squids and certain fishes(Brownell 682a). Very little is known about this group of whales for they are hardly detected and hard to find at sea (Brownell 682a). The last type of tooth whale is the Belugas. “Belugas are white or yellow-tan when their fully grown and are often called
A single oyster can clean 1 to 10 gallons of water per hour; every square meter of an oyster reef can hold 1,000 oysters. Humans have positive and negative effects on the reefs. An example of a positive effect of humans was here right a FGCU. 200 volunteers built a reef from fossil oyster shells at an unknown mangrove island near the mouth of spring creek in Estero Bay.
November 29th, 2012 S1836597 AP Psychology When one goes to sleep for the night, his or her body and mind do phenomenal things while unconscious. There are two types of sleep, NREM and REM, and there are five major sleep cycles which a person undergoes nightly. Every 75 through 100 minutes a sleeper undergoes these stages. These are sections 1, 2, 3, 4 and REM. The first stage of sleep lasts for about 5-10 minutes as you are falling asleep.