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Bio 106 Lab Bivalvia Functions
structure and function of Bivalvia
21
Zoology
Undergraduate 2
10/24/2017

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Term
Incurrent & Excurrent Siphons
Definition
Transport water out of body
Term
Gills
Definition
Respiration and filter feeding

Females brood eggs in gill pouches
Term
Mantle
Definition
Thin membrane secretes shell
Term
Shell
Definition
Hard outer covering, protects soft internal organs

Composed of calcium carbonate and protein
Term
Foot
Definition
Used for burrowing and locomotion
Term
Visceral Mass
Definition
Pouch houses several major internal organs
Term
Adductor Muscle
Definition
Closes shell and holds valves tightly together

Located at anterior (smaller) and posterior (larger) ends
Term
Labial Palps
Definition
Collects food particles from gills and transports to mouth
Term
Mouth
Definition
Ingestion of food
Term
Esophagus
Definition
Short tube, food passes from mouth to stomach
Term
Stomach
Definition
Small chamber, food storage
Term
Digestive Gland
Definition
Secretes digestive enzymes into stomach and intestine to help w/ chemical breakdown of food
Term
Intestine
Definition
Absorption of nutrients
Term
Anus
Definition
Egestion
Term
Gonad
Definition
Produces gametes for reproduction
Term
Heart
Definition
Receives blood from gills and pumps to neighboring tissues and organs
Term
Kidney (Nephridium)
Definition
excretion of nitrogenous wastes
Term
Pericardial Membrane
Definition
Covers heart
Term
Water Movement
Definition
Ventral incurrent siphon
Gills
Dorsally through mantle cavity and 180 degree turn
Kidney
Anus
Dorsal excurrent siphon
Term
Reproduction
Definition
Eggs
Glochidia larva (parasitic)
Adult
Term
Circulatory System (blood flow)
Definition
Tissues and organs to gills
Heart (Ostia- in) (Arteries- out)
Mantle
Foot
Visceral mass
Open sinuses in tissues
Veins (collect blood, return to gills)
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