MOLLUSCA

Mollusca

Mollusca are soft and do not have the animal segments. Tripoblastik animal body, bilateral symmetry, generally have a coat that can produce graft material in the form of calcium carbonate. The graft serves as a home (framework outside) made of calcium for example clams, oysters, snails and snail fields. But there is also Mollusca who do not have a transplant, such as squid, cuttlefish, octopus or snails naked. Mollusca has a muscular structure called the foot of the form and function is different for each class.

Which includes this phylum are: snails, squid and so on. the principle of bilateral symmetrical body edged not have a transplant from CaCO3. body clam, mussel and snail is usually stored in the graft, so do not Visible from the outside. when a safe condition in the body stick out and that looks the first time is his legs, and feet are for walking and swimming. between the body and transplant there is a pack which is called mantel.biasanya anus opens on the cavity. squid's body is not stored in the graft; graft contained in the body as an amplifier. wrap coat jerohan tools (viceral).

Graft shells consist of two parts, while the graft is shaped like a cone snail that circular. Another difference, thin legs and flat snail. Its function is to walk by muscle contraction. As with the oysters that have a foot like the eye axes used to walk in mud or sand. Meanwhile, squid and cuttlefish do not have a transplant, his feet located at the head of which serves to catch prey.

Mollusca have a complete digestive tool from the mouth that have a radula (tongue grated) through the anus opens in the mantle cavity. In addition there are also the digestive glands that are growing well. This open blood circulation occurs in all classes except the class Cephalopoda Mollusca.

Breathing is done by using gill or "lung", a coat or by the epidermis. Tool in the form of renal excretion. The nervous system consists of three pairs of ganglion cerebral ganglion, visceral ganglion and the pedal ganglion that all three are connected by longitudinal nerve cords. Reproductive organs are generally separate or united and internal or external fertilization.

Common characteristics mollusca

- Soft body, not bersegmen

- Flat feet, wide and muscular

- Secretion of substances shell = calcium carbonate

- The bilateral body symmetry

- Have mucus glands contained in the gland graft material maker

- Any body part that acts as a foot

- Sexual reproduction

Posted by Unknown on - Rating: 4.5

Title : MOLLUSCA
Description : Mollusca Mollusca are soft and do not have the animal segments. Tripoblastik animal body, bilateral symmetry, generally have a coat that...

Tweet