Squid Anatomy Terms and Functions Flashcards

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Questions and Answers

What are chromatophores?

Coloured pigment cells for camouflage and communication (correct)

Eyestructures like those in humans

Muscles for jet propulsion

Digestive organs

What are eyes constructed like in squids?

Much like our own, with cornea, lens, iris, retina, and optic nerve.

What is the function of arms in squids?

Used to manipulate prey; covered with suckers.

What are tentacles used for in squids?

Grasping prey and mates during reproduction. Signup and view all the answers

What are suckers in squids?

Small muscular suction cups on arms and tentacles. Signup and view all the answers

What is the function of the siphon in squids?

Directing jet propulsion and waste elimination. Signup and view all the answers

What does the mantle do in squids?

Encloses the mantle cavity and houses the body's organs. Signup and view all the answers

What are fins used for in squids?

To guide and steer during swimming. Signup and view all the answers

How is the squid's brain characterized?

Highly developed for an invertebrate. Signup and view all the answers

What is the buccal mass in squids?

A mass of muscles, jaw, and radula. Signup and view all the answers

What are mandibles (beak) in squids?

Chitinous beak-like jaws. Signup and view all the answers

What is the function of the radula?

Scraping organ used for feeding. Signup and view all the answers

What does the esophagus do?

Passes food from the mouth to the stomach. Signup and view all the answers

What is the role of the liver in squids?

Produces digestive fluids for food digestion and detoxification. Signup and view all the answers

What are nephridia (kidneys) in squids?

Excretory organs that filter waste products from blood. Signup and view all the answers

What does the pancreas secrete?

Digestive enzymes responsible for digestion. Signup and view all the answers

What is the main function of the stomach?

Digests the food. Signup and view all the answers

What is the caecum?

Long white organ that receives food from the stomach and stores it for digestion. Signup and view all the answers

What does the intestine do?

Receives food from the caecum, absorbs nutrients, and transfers waste. Signup and view all the answers

What are retractor muscles?

Large muscles connected to the siphon that allow for jet propulsion. Signup and view all the answers

What do gills do in squids?

Used for breathing, allow for oxygen uptake and elimination of carbon dioxide. Signup and view all the answers

What are branchial hearts?

Pump blood to the gills. Signup and view all the answers

What does the systemic heart do?

Receives oxygenated blood from the gills and pumps it to the body. Signup and view all the answers

What is the function of the ink sac?

Produces ink for protection. Signup and view all the answers

What is the rectum?

Final portion of the digestive tract that temporarily stores waste. Signup and view all the answers

What are gonads?

Reproductive organs that produce sperm and eggs. Signup and view all the answers

What do nidamental glands do in females?

Secrete the gelatinous matrix that surrounds squid eggs. Signup and view all the answers

What is the role of the anus?

Eliminates waste. Signup and view all the answers

What is a pen in squids?

The internal shell that provides structural support. Signup and view all the answers

Study Notes

Chromatophores

Coloured pigment cells enabling color change for camouflage and communication among squid.

Eyes

Similar structure to human eyes, comprising cornea, lens, iris, retina, and optic nerve.

Arms

Manipulate prey; characterized by the presence of suckers for gripping.

Tentacles

Grasp prey and mates, longer than arms, with suction cups located only at their tips.

Suckers

Muscular suction cups on arms and tentacles, utilized for holding prey and mates.

Siphon

Flexible tube facilitating jet propulsion; also functions for waste elimination and ink release.

Mantle

Main body section, encasing organs within the mantle cavity; replaces traditional molluscan shell.

Fins

Extensions of the mantle used for guidance and steering during swimming.

Brain

Highly developed compared to other invertebrates, indicating advanced cognitive abilities.

Buccal Mass

Composed of muscles, jaws, and radula, it operates the jaw and aids in feeding.

Mandibles (beak)

Chitinous, beak-like jaws facilitating food intake and manipulation.

Radula

Scraping organ acting as a conveyor belt for feeding, akin to a tongue.

Esophagus

Tube connecting the mouth to the stomach for food passage.

Liver

Produces digestive fluids aiding in digestion and detoxification of impurities.

Nephridia (kidneys)

Excretory organs filtering waste products from the blood.

Pancreas

Secretes digestive enzymes vital for food breakdown.

Stomach

Primary organ for food digestion.

Caecum

Long organ storing food received from the stomach for further digestion.

Intestine

Absorbs nutrients from food and transfers them to the blood; also carries waste to the anus.

Retractor Muscles

Large muscles connected to the siphon that enable jet propulsion.

Gills

Feathery structures for respiration, facilitating oxygen uptake and carbon dioxide elimination.

Branchial Hearts

Special hearts that pump blood to the gills, located at the base of each gill.

Systemic Heart

Receives oxygenated blood from the gills and pumps it throughout the body.

Ink Sac

Produces protective ink, expelled through the siphon into water.

Rectum

Final segment of the digestive tract for temporary waste storage.

Gonads

Reproductive organs; male testes produce sperm, while female ovaries generate eggs.

Nidamental Glands

Female organs secreting the gelatinous matrix surrounding squid eggs.

Anus

Opening for waste elimination.

Pen

Internal shell providing structural support within the mantle, remnants of ancestral shells.

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Description

Explore the fascinating anatomy of squids with this flashcard quiz. Learn about key terms such as chromatophores, eyes, arms, and tentacles, and their specific functions. Perfect for marine biology enthusiasts and students!