biology

2. a cell or plastid that contains pigment.
6. circulatory system are systems where blood, rather than being sealed tight in arteries and veins, suffuses the body and may be directly open to the environment at places such as the digestive tract. ... It also contains immune cells – but hemolymph does not have red blood cells like our own.
7. (as it relates to molluscs) A siphon is a long tube-like structure that is present in certain aquatic molluscs: Gastropods, bivalves, and cephalopods. The tube is used for the exchange of liquids, or air. This flow can have different purposes, the most common are breathing, locomotion, feeding and reproduction.
9. palps secrete a mucus that entangles suspended food and nutrient particles within the water to produce a ball of food and mucus called a bolus. Afterwards, cilia on the palps direct the bolus into the mouth.

1. a protein capsule containing a mass of spermatozoa, transferred during mating in various insects, arthropods, cephalopod mollusks, etc.
3. (in a gastropod mollusk) the spontaneous twisting of the visceral hump through 180° during larval development.
4. also called pallium, plural pallia, or palliums, in biology, soft covering, formed from the body wall, of brachiopods and mollusks; also, the fleshy outer covering, sometimes strengthened by calcified plates, of barnacles. Mantle.
5. (in a mollusk) a structure of tiny teeth used for scraping food particles off a surface and drawing them into the mouth.
8. a modified arm used by male octopuses and some other cephalopods to transfer sperm to the female.