Spleen: A shark’s spleen’s purpose is to create red blood cells. In humans, red blood cells are created in bone marrow, however, sharks have no bones or bone marrow. A shark’s spleen is the main part of its immune system.
Does a dogfish have a spleen?
Digestive Organs
One lobe runs from the pyloric sphincter to the spleen, the other along the edge of the duodenum. They meet anteriorly forming one duct, which enters the duodenum beside or with the bile duct. The dark reddish brown spleen is an elongate lobe on the left side just below the stomach.
Where is a spleen in a shark?
The dark, triangular-shaped spleen is located near the posterior end of the stomach. Although a part the Iymphatic system, the spleen is closely associated with the digestive organs in all vertebrates.
What is the function of a shark’s gallbladder?
Gall bladder: stores bile produced by the liver before it is delivered to the duodenum via the bile duct.
What is the function of the spleen?
The spleen has some important functions: it fights invading germs in the blood (the spleen contains infection-fighting white blood cells) it controls the level of blood cells (white blood cells, red blood cells and platelets) it filters the blood and removes any old or damaged red blood cells.
What structure is unique to dogfish?
A feature peculiar to our specimen, the spiny dogfish, is the presence of two spines, one immediately anterior to each dorsal fin. When captured, these sharks will arch their backs and attempt to pierce their captor with these long sharp spines.
What is the function of a liver in a shark?
Shark livers are huge, consisting of two large lobes surrounding the digestive tract. In some sharks the liver comprises up to 30% of their body weight. The liver stores carbohydrates and fats, releases sugars for energy when needed, and contains oils that assist with buoyancy.
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 features of a shark’s anatomy allow it 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.
What are the functions of the spleen quizlet?
The spleen has four functions: (1) it filters antigen from the blood (2) it is the site of B cell maturation, (3) it stores blood, and (4) it destroys old red blood cells. You just studied 7 terms!
Where is the spleen?
| Spleen | |
|---|---|
| The human spleen is located in the upper left abdomen, behind the stomach | |
| Details | |
| System | Immune system (Lymphatic system) |
| Artery | Splenic artery |
Which is not a function of the spleen?
Answer and Explanation: The spleen does not (b) produce new erythrocytes in adults. Erythrocytes are produced by bone marrow cells.
What common feature is absent in the dogfish shark?
There is no notch on the upper caudal lobe and the lower caudal lobe is not well-developed. There is no anal fin on the spiny dogfish.
What sensory organs do dogfish sharks have?
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. Fertilization in the dogfish shark is internal.
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.
Do sharks have 2 Hearts?
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.
Do sharks poop?
So, do sharks poop? They sure do! Every living animal that consumes food has to have a way of getting rid of waste.
What is the most important body part of a shark?
The tail fin is one of the most important parts of the entire shark anatomy. Because of all of these different types of fins, sharks are able to maneuver swiftly through the water while also remaining stabilized.
Can shark skin cut you?
Sharks have been reported to inflict wounds on man by means other than biting. One of these includes “bumping,” in which the shark makes a close pass by the victim. This action may result in lacerations and abrasions from the shark’s rough skin [2, 3].
What organs do sharks have that humans don t?
The Coveted Sixth Sense
Sharks have some senses we do not experience at all. One of them is the electroreception or ampullae of Lorenzini, a sixth sense. It is an electro-sensory system that works through receptors around the head and snout. They are places in a sort of jelly-filled organ called ampullae of Lorenzini.
What are 3 adaptations that allow sharks to live in water?
Unique Adaptations That Sharks Have to Survive
- Swimming. Sharks have several adaptations that help them swim without expending too much energy, and enable them to maneuver quickly and with agility.
- Hunting. Sharks have several means of sensing prey.
- Teeth. When sharks lose a tooth, a new one grows to replace it.
- Camouflage.
Lorraine Wade is all about natural food. She loves to cook and bake, and she’s always experimenting with new recipes. Her friends and family are the lucky beneficiaries of her culinary skills! Lorraine also enjoys hiking and exploring nature. She’s a friendly person who loves to chat with others, and she’s always looking for ways to help out in her community.