Dogfish Shark

Matthew Fontenot

Anatomy

External Anatomy

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Internal Anatomy

Gallbladder - A green organ that is attached to the liver. Bile is stored in the gallbladder until it is needed.

Heart - Two chambered muscle, The heart is an S shaped tube that is located in the head of the shark.

Kidney - Two dark-colored organs on either side of the midline. The organ controls its urinary system by extracting urea from urine and returns the urea to the blood. The water pressure of the shark's body fluids are maintained as high as that of seawater.

Liver - It takes up a lot of space internally and serves also to produce oil to help the shark stay buoyant underwater.

Pancreas - Located on the duodenum and the lower stomach. It's a digestive gland and produces hormones as well as digestive enzymes to help break down fats and carbs in the stomach.

Small intestine - Long, narrow organ in which food is digested after it leaves the stomach.

Large intestine - Wide and short organ, in which feces is formed.

Stomach - a J-shaped organ that helps digest food.

Rectum - a long, narrow part that leads into the colon, it also regulates the sharks salt balance.

Claspers - stout organs on the inner side of their pelvic fins, a male reproductive organ.

Lateral Line - an organ running lengthwise down the sides of fish, used for detecting vibrations and pressure changes.

Lagniappe

Classification:

Kingdom: Animalia

Phylum: Chordata

Class: Chondrichthyes

Order: Squaliformes

Family: Squalidae

Genus: Squalus

Species: Acanthias

Lifespan: 30-100 Years.

Habitat: Coastal Areas.

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Spiny Dogfish