What benefit might the configuration of the scales have to sharks?
What benefit might the configuration of the placoid scales have to a sharks swimming ability? placoid scales create turbulence in the water and allow sharks to swim with ease through the water. What purpose might the lateral line system have to a fish, especially in murky waters?
Why are the spiracles important on a dogfish shark?
Why are the spiracles important on a dogfish shark? Why are the spiracles important on a dogfish shark? Spiracles- These are small openings caudal from the eyes. These openings allow water to pass through the gills even when the shark's mouth is closed.
What is the function of the mouth in a shark?
These openings allow water to pass through the gills even when the shark's mouth is closed. 3. Mouth- Although the eating function is evident, the mouth is also used for the intake of water that passes through the gills.
Why would a shark need to regulate its internal salt concentration?
Why would a shark need to regulate its internal salt concentration? The real gland regulates the internal salt intake because too much salt can cause internal drying and abrasions. How is the structure of the gills suited to their function in respiration?
What part of the shark's anatomy makes the shark stable and prevents it from rolling?
There are one or two fins present along the dorsal midline called the first and second dorsal fin. These are anti-roll stabilizing fins. These two fins may, or may not have spines at their origin.
What features of a shark's anatomy or body allow it to be able to survive in the ocean?
Shark skeletons are made of cartilage. This is strong and durable, yet much more flexible and lighter than bone. Being lighter helps a shark to stay afloat and reduces the amount of energy they need to move about. The flexibility of cartilage also allows them to make tight turns quickly.
How is the shark's digestive system different from humans?
How is the shark's digestive system different from a human's? Sharks have U-shaped stomachs that use intense stomach acids and enzymes to dissolve most of what it has eaten. The digestion in the stomach is different compared to humans because our diets are very different.
What sensory organs do dogfish sharks have and what are their functions?
eyes, snout, and nostrils are the openings of the ampullae of Lorenzini. These sense organs are sensitive to changes in temperature, water pressure, electrical fields, and salinity. organs called claspers on the inner side of their pelvic fins.
What is rostrum in shark?
The rostrum is the pointed snout at the anterior end. This tapered tip at the anterior end helps overcome water resistance in swimming. The eyes are prominent in sharks and are very similar to the eyes of man. A transparent cornea covers and protects the eye.
What adaptations help a shark survive?
Adaptations. Shark bodies have a torpedo shape to reduce drag in the water. White sharks have stiffer tail fins and more symmetrical bodies than other sharks, which enable them to move more efficiently through the water.
What is unique about the shark digestive tract?
Sharks have large J-shaped stomachs that can expand considerably. When prey is captured, it is usually swallowed whole or in large pieces. The stomach produces an acid that is strong enough to dissolve metal.
How does a sharks digestive system work?
Sharks have U-shaped stomachs that use very strong acids and enzymes to dissolve most of what is eaten. The stomach produces an easily absorbed, soupy mush. Only this liquid mush enters the intestines because the pyloric valve (the valve between the stomach and the intestines) is small.
How does shark digestion work?
0:357:35The Shark Digestive System - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo let's get down to the nitty-gritty that is the shark digestive system digestion always beginsMoreSo let's get down to the nitty-gritty that is the shark digestive system digestion always begins with the mouth now in the case of humans we masticate our food and mastication is the act of chewing.
What sensory organs did the shark have?
Sharks have a complex electro-sensory system. Enabled by receptors covering the head and snout area. These receptors sit in jelly-filled sensory organs called the ampullae of Lorenzini. These tiny pores are extremely sensitive and can detect even the faintest of electrical fields.
How do sharks maintain buoyancy?
Without the oil in their livers, the sharks will sink to the bottom of the ocean! Oil is much lighter than water, which is why it was afloat while the water sunk. Sharks mainly rely on their large oil-filled liver to stay buoyant in the oceans.
How do sharks sense movement in the water?
Motion Detector Like most other fish, sharks can detect movements in the water around them via a set of small fluid-filled canals that run along their sides. These canals make up an organ called the lateral line.
What is the advantage of the spiral valve in the shark's intestine?
Likewise, what is the advantage of the spiral valve in the shark's intestine? The advantage is that the spiral valve allows the shark to absorb more nutrients. The difference in sharks small intestine is that it is much shorter than humans or other animals in relation to its body size, the spiral valve coils the intestine in an efficient spiral shape.
What do sharks use their nose for?
Sharks use gills for respiration purposes. Humans use their nose for both breathing and smelling.
