Which Organs Are Found In A Dogfish Sharks Pericardial Cavity?

• Pericardial Cavity- holds the heart and branching arteries; protection.
• Ovaries- two cream colored organs, dorsal to the liver; function in the storage of eggs.
• Efferent brachial Arteries- Brings blood into the fins and back to the heart.
• Gill rakers- increases the surface area of the gills in order to take in more oxygen.

What is the pericardial cavity in sharks?

The pericardial cavity is the upper portion of the body cavity. It is much smaller than the lower cavity, which contains the digestive organs. The pericardial cavity is located anterior to the transverse septum and contains the heart and the major blood vessels leading to and from the heart.

Does a dogfish shark have a liver?

There is a short large intestine, which enters the cloaca via the anus. The large liver is not lobed but weakly scalloped posteriorly. The gall bladder is on the liver near the duodenum. The hepatic ducts and bile duct empties into the duodenum as in the shark, but may be difficult to see.

Do dogfish sharks have lungs?

The lungs are long, slender and saclike. They run along the dorsal sides of the pleuroperitoneal cavity and are attached to the body wall by the pulmonary ligament on the left side and on the right, the hepatocavopulmonary ligament that also supports the liver.

What is the circulatory system of a dogfish shark?

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.

What organs are in the pericardial cavity?

The pericardial cavity lies just anterior to the liver. It is enclosed by the pericardial sac and contains the heart (Figure 5.32).

What is pericardial cavity and its contents?

The pericardial cavity is the potential space formed between the two layers of serous pericardium around the heart. Normally, it contains a small amount of serous fluid that acts to reduce surface tension and lubricate. Therefore, the cavity facilitates the free movement of the heart.

Do dogfish sharks have a pancreas?

The general pattern is to have an oral cavity, pharynx, esophagus, stomach and intestine. Accessory organs are the pancreas, liver and gallbladder, which arise as evaginations from the embryonic digestive tract.

What does the liver do in dogfish?

Its two main lobes, the right and left lobes, extend from the pectoral girdle posteriorly most of the length of the cavity. A third lobe much shorter lobe is located medially and contains the green gall bladder along its right edge. The liver is rich in oil which stores energy for the shark.

What does the intestine do in a dogfish shark?

The increased surface area of the intestines increases the food’s transit time through the intestines, which increases the amount that can be absorbed. The spiral valve allows the food to be completely absorbed and digested. The more food that can be absorbed, the less a shark has to eat.

How do dogfish sharks breathe?

The Pacific Spiny Dogfish has a unique system of ventilation. This shark has five gills on each side, but do not have gill covers like bony fish. The shark is able to breathe with these gills by swimming or staying in the current.

Do dogfish sharks have brains?

The brain in encased in membranes called meninges. In dogfish there is only a single meninx, which holds cerebrospinal fluid between it and the brain. The cerebrospinal fluid also circulates within the cavities of the brain and spinal cord.

What do the kidneys look like in a dogfish shark?

The kidneys are flattened, ribbon-like, darkly colored structures Iying dorsally on either side of the midline, along the entire length of the body cavity. A tough white glistening strip of connective tissue is found between the kidneys in the midline.

What organs do sharks have?

Seen in this picture of a blue shark are the liver, stomach and intestine. The oviduct, part of the female reproductive tract is also visible. Upon incision of the belly from the pelvic fins to the pectoral fins the first organ encountered is the liver. The liver of sharks occupies most of the body cavity.

What type of circulatory system do sharks have?

Sharks possess a single-circuit circulatory system centered around a two-chambered heart. Blood flows from the heart to the gills where it is oxygenated. This oxygen-rich blood is then carried throughout the body and to the tissues before returning to the heart.

Does a shark have a heart?

Circulatory System
A shark’s heart is a two-chambered S-shaped tube, small in proportion to body size. Blood flows from the heart to the gills and then to body tissues.

What is normally found in the pericardial cavity quizlet?

The pericardial cavity separates the parietal and visceral pericardium. This cavity contains serous fluid that lubricates the visceral and parietal membranes.

What is the pericardial cavity quizlet?

The enclosed space between the parietal and visceral layers of the pericardium which contains the serous fluid which lubricates the membrane surfaces and allows easy heart movement.

Are the lungs located in the pericardial cavity?

Thoracic Cavity: The ventral body chamber that contains the pericardial cavity (the heart) and the pleural cavity (the lungs).

What is the function of the pericardial cavity?

The pericardium acts as mechanical protection for the heart and big vessels, and a lubrication to reduce friction between the heart and the surrounding structures.

Why is the pericardial cavity important?

The pericardial cavity—located between the outer and inner serous layer—contains a small amount of lubricating fluid, called serous fluid, which helps to lower the level of friction generated as the muscle of the heart contracts.