Do mollusks have divided body parts?

The mollusk body can generally be divided into three regions: the head, the foot, and a cluster of internal organs called the visceral mass.

1. How are mollusks divided?
2. Do mollusks have bodies divided into segments?
3. What are the parts of the mollusks?
4. Do all mollusks have tentacles?
5. Which part of the mollusk body contains organs?
6. Do mollusks have limbs?
7. What 2 other parts do all mollusks have?
8. What 3 body parts do all mollusks have?
9. What parts do all mollusks have an What are the functions of these parts?
10. Which class of mollusks all have tentacles?
11. What are the four parts of the body plan of most mollusks?
12. Do mollusks have an exoskeleton?
13. Do mollusks have tissues?
14. Are mollusks Heterotrophs or Autotrophs?
15. Which part of the mollusks body is the tissue covering the body and secretes the shell?
16. What features of molluscs appear in other phyla?
17. Does a Mollusca have a shell?

How are mollusks divided?

Mollusks are subdivided into seven classes with most species found in three of those classes: Gastropoda, Bivalvia, and Cephalopoda. ... The remaining classes (Polyplacophora, Aplacophora, and Monoplacophora) have fewer species.

Do mollusks have bodies divided into segments?

Mollusks are invertebrates (animals without a backbone) with soft bodies. Their bodies are not divided into different segments or parts. Mollusks often have a hard outer shell to protect their bodies. All mollusks have a thin layer of tissue called a mantle which covers their internal organs.

What are the parts of the mollusks?

The four important body parts in the mollusk could be listed as: Shell, Mantle, Visceral Mass and Foot.

Do all mollusks have tentacles?

Most mollusks have tentacles for feeding and sensing, and many have a muscular foot. Mollusks also have a coelom, a complete digestive system, and specialized organs for excretion. The majority of mollusks live in the ocean. Different classes of mollusks have different ways of obtaining food.

Which part of the mollusk body contains organs?

The mollusk body can generally be divided into three regions: the head, the foot, and a cluster of internal organs called the visceral mass. The visceral mass includes many of the organs mentioned in the previous concepts such as the stomach, the heart, the nephridia, and the gonads.

Do mollusks have limbs?

Mollusks don't have legs, though some have flexible tentacles for sensing their environment or grabbing things. Most mollusk species grow a hard shell for protection, but their shell grows in only one or two pieces. It doesn't have joints like the exoskeletons of insects and crustaceans .

What 2 other parts do all mollusks have?

All mollusks have a visceral mass, a mantle, and a foot. The visceral mass contains the digestive, excretory, and reproductive organs. The mantle is a covering.

What 3 body parts do all mollusks have?

In general, mollusks have 3 body regions: a head, a visceral mass, and a "foot." The head contains the sense organs and "brain," while the visceral mass contains the internal organs.

What parts do all mollusks have an What are the functions of these parts?

The visceral mass includes all of the mollusk's organs. These organs include a three-chambered heart in most mollusks and three separate hearts in cephalopods. Unlike most mollusks, cephalopods have closed circulation system. All mollusks have highly developed tubes that perform their kidney functions.

Which class of mollusks all have tentacles?

Class Cephalopoda. The cephalopods are molluscs with large heads and tentacles. Examples of cephalopod molluscs include squid, octopus, cuttlefish, and nautilus (Fig. 3.65).

What are the four parts of the body plan of most mollusks?

The body plan of most mollusks has four parts: foot, mantle, shell, and visceral mass.

Do mollusks have an exoskeleton?

Molluscs are mostly aquatic, and are named from the Latin molluscus, meaning "soft". Their soft bodies are enclosed in a hard shell made of calcium carbonate (CaCO3), which functions as an exoskeleton.

Do mollusks have tissues?

Mollusks have a hard outer shell. There is a layer of tissue called the mantle between the shell and the body. Most mollusks have tentacles for feeding and sensing, and many have a muscular foot. Mollusks also have a coelom, a complete digestive system, and specialized organs for excretion.

Are mollusks Heterotrophs or Autotrophs?

Yes, all mollusks are heterotrophic, because mollusks are animals, and all animals are heterotopic, meaning that they need to consume organic carbon...

Which part of the mollusks body is the tissue covering the body and secretes the shell?

In shelled molluscs, the mantle is the organ that forms the shell, and adds to the shell to increase its size and strength as the animal grows. Shell material is secreted by the ectodermic (epithelial) cells of the mantle tissue.

What features of molluscs appear in other phyla?

The three most universal features defining modern molluscs are a mantle with a significant cavity used for breathing and excretion, the presence of a radula (except for bivalves), and the structure of the nervous system.

Does a Mollusca have a shell?

The mollusc (or mollusk) shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes.