Which of the following is a tube shaped body form with a mouth surrounded by tentacles?

Which of the following is a tube shaped body form with a mouth surrounded by tentacles?

a cnidarian body form that is tube-shaped with a mouth surrounded by tentacles. in cnidarians, a large cavity in which digestion takes place.

What is the tube shaped body form of a cnidarian called?

`polyp. the sessile, tubular form of a cnidarian with a mouth and tentacles at one end and a basal disk at the other. pharynx. throat; passageway for food to the esophagus and air to the larynx.

What has a muscular tube called the pharynx?

Esophagus: The esophagus is a muscular tube that connects the pharynx (throat) to the stomach. The esophagus contracts as it moves food into the stomach.

How is a sponges food gathering technique adapted to its sessile lifestyle?

How is a sponge’s food-gathering technique adapted to its sessile lifestyle? They are filter feeders so they don’t need to move to eat. Compare and contrast the sexual and asexual phases of jellyfish reproduction.

What are 2 body forms of cnidarians?

They have a simple body consisting of a central gut cavity surrounded by tentacles. A jelly-like substance called mesoglea lies between the outer and inner layers of the body. There are two basic cnidarian body shapes: a polyp form, which is attached to a surface; and an upside-down free-floating form called a medusa.

What is the meaning nematocyst?

Nematocyst, minute, elongated, or spherical capsule produced exclusively by members of the phylum Cnidaria (e.g., jellyfish, corals, sea anemones). After eversion, the thread separates from the nematocyst. The threads of some nematocysts ensnare small prey by wrapping about them.

In what way is a sponge similar to a cnidarian?

These organisms show a simple organization. Sponges have multiple cell types that are geared toward executing various metabolic functions. Cnidarians have outer and inner tissue layers sandwiching a noncellular mesoglea. Cnidarians possess a well-formed digestive system and carry out extracellular digestion.

What are the 3 parts of pharynx?

The throat (pharynx) is a muscular tube that runs from the back of your nose down into your neck. It contains three sections: the nasopharynx, oropharynx and laryngopharynx, which is also called the hypopharynx.

What is difference between esophagus and pharynx?

The esophagus is a collapsible muscular tube that serves as a passageway between the pharynx and stomach. As it descends, it is posterior to the trachea and anterior to the vertebral column. It passes through an opening in the diaphragm, called the esophageal hiatus, and then empties into the stomach.

How do sponges defend themselves?

The pointed sponge spicules function as one method of defense against predators. Sponges also defend themselves by producing chemically active compounds. Some of these compounds are antibiotics that prevent pathogenic bacterial infections, and others are toxins that are poisonous to predators that consume the sponge.