What organ systems do sharks have?

What organ systems do sharks have?

Sharks have a simple circulatory system composed of an auricle and a ventricle. Blood flows from the ventricle to the ventral aorta. From there blood moves into the branchial arteries and the capillaries located in the gills.

Where is a shark’s mouth located?

ventral
In almost all sharks, the mouth is ventral (belly side) and pointing down. Only rarely are sharks’ mouths located at the front, pointing forward (as in the whale shark). Jaw size and shape vary considerably from species to species. For example, the basking shark has a spectacularly wide jaw to aid in filter feeding.

What is the function of the mouth in sharks?

Like its fins and sense organs, the shark’s mouth is a highly effective physiological adaptation, perfectly suited to its job. There are two elements that make the mouth so effective: the teeth and the jaws. Shark teeth are something like the teeth of land predators. They have very sharp points that will cut into meat.

Do sharks have a circulatory system?

In the shark, the circulatory and respiratory systems is one as the heart pumps unoxygenated blood to the gills for oxygenation and from their oxygenated blood is distributed to the body. Gas exchange also takes place in the skin, but primarily in the gills.

Do sharks have mammary glands?

Sharks do not have mammary glands, and do not feed their young, so are therefore disqualified from being named mammals. Sharks use gills to breath with, as fish do, rather than lungs that exchange respiratory gases.

What is the mouth of a shark called?

Nearly all sharks have what is known as a subterminal mouth, located on the ventral surface (underside) of the head behind the snout. The upper jaw is suspended below the skull, attached by ligaments, muscle, and connective tissue.

Do sharks have vertebrae?

Do sharks have vertebrae? Sharks do have vertebrae. They have a backbone (vertebrae), a spinal cord, and a notochord. This is what makes them vertebrates, just like us humans.

What organ inside a shark is responsible for making a shark’s blood so dirty?

Liver
F. Liver: Taking up roughly 80% of the shark’s internal body cavity, the liver is the largest of sharks’ organs. The liver stores energy as dense oil which helps the shark with buoyancy, its ability to float. It also works as a part of the digestive system and helps filter toxins out of the shark’s blood.

Do sharks have a liver?

Liver. A shark’s liver is made of two large lobes that concentrate and store oils and fatty acids. The liver functions in energy storage and buoyancy. A shark’s liver is relatively large, making up 5% to 25% of its total body weight and takes up to 90% of the space inside its body cavity.

What kind of cells Do sharks have?

As in humans, sharks have two basic types of blood cell, white and red. White blood cells are primarily involved in the body’s immunological defense against foreign invaders (such as disease-causing microbes), while red blood cells are the main carriers of respiratory gases.