Does the clam have a respiratory organ quizlet?
How do clams breathe? Clams use two pairs of feathery gills for respiration (gas exchange) as oxygen diffuses into the gills.
When you open a clam will the internal organs be visible?
When you open the clam, will all the internal organs be visible? No, because it has the outer shell covering it. Explain how a clam moves. The clam moves by the foot which is one of the important organs and it is located between the shells.
What is the function of the toothlike projections at the dorsal edge of the clam’s valves?
What is the function of the tooth-like projections at the dorsal edge of the clam’s valves? These microscopic teeth help make sure that the valves align properly while closing. To make sure that the shells form a tight seal of protection.
What part of the clam keeps the shell closed?
adductor muscles
BACKGROUND: Clams are bivalves, meaning that they have shells consisting of two halves, or valves. The valves are joined at the top, and the adductor muscles on each side hold the shell closed.
What is the body cavity of a clam called?
coelom
But molluscs have developed a true coelom, an internal body cavity enclosed by mesodermal membranes. The coelom in molluscs, however, is strangely reduced to a small space around the heart, sometimes called a hemocoel.
What holds the two valves together and open and close the clam?
Bivalve molluscs are completely enclosed by a shell made of two valves hinged at the top. A hinge ligament made of elastic protein joins the two halves of the shell together, and large adductor muscles between the two valves hold them closed.
What is the function of the hinge ligament in a clam?
A hinge ligament made of elastic protein joins the two halves of the shell together, and large adductor muscles between the two valves hold them closed. When the shell is closed, the top part of the hinge ligament is stretched and the lower part is compressed.
What is the function of the siphons in a clam?
Siphons in molluscs are tube-like structures in which water (or, more rarely, air) flows. The water flow is used for one or more purposes such as locomotion, feeding, respiration, and reproduction. The siphon is part of the mantle of the mollusc, and the water flow is directed to (or from) the mantle cavity.
What is the oldest part of the clam called?
the umbo
Locate the umbo, the bump at the anterior end of the valve. This is the oldest part of the clam shell.
What is protective structure of clam?
The soft body of the clam is protected from predators by a two-parted shell that is hinged. The shell is produced by a tissue called the mantle that is adjacent to the shell. The clam has a pair of very large gills, and the surface of the gills is covered with cilia.
What organ systems do clams have?
CLAM BODY SYSTEMS.
What is the function of the hinge on a clam?
What is a clam foot called?
The bivalve foot, unlike that of gastropods, does not have a flat creeping sole but is bladelike (laterally compressed) and pointed for digging. The muscles mainly responsible for movement of the foot are the anterior and posterior pedal retractors.
What is the mantle in a clam?
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 is the mantle cavity in a clam?
The mantle cavity is a central feature of molluscan biology. This cavity is formed by the mantle skirt, a double fold of mantle which encloses a water space. This space contains the mollusk’s gills, anus, osphradium, nephridiopores, and gonopores. The mantle cavity functions as a respiratory chamber in most mollusks.
What are baby clams called?
Littlenecks: These little guys are on the smaller side of the quahog family (a blanket term for a variety of hard-shell clams that vary in size) and are wee, sweet and pretty marvelous served raw on their hard half shells.
How does blood flow in the clam?
Blood is pumped by the heart into blood vessels. The blood leaves the vessels and flows into cavities called sinuses. Sinuses surround body organs and extend into all parts of the clam. As the blood moves past the intestine, it picks up food molecules and carries these molecules throughout the clam.
What type of system does a clam have?
open circulatory system
Clams have an open circulatory system; humans have a closed circulatory system. Both systems move blood throughout the organism providing exchange of nutrients/oxygen for waste products/carbon dioxide, at the cellular level.
What is the function of the two openings in a clam?
Two openings on the posterior end of the clam. Incurrent siphon carries water into the clam and the excurrent siphon where water wastes and water leaves.
What is the phylum and class of a clam?
Give the kingdom, phylum, and class for the clam. In the Anamalia Kingdom, the Phylum Mollusca (soft), and the class of Bivalvia or Pelecypoda. (2 shells) Describe the body of bivalves.
What do the rings on a clam’s shell indicate?
It is the “hinge” where the clam opens. (the pointy part) What do the rings on the clam’s shell indicate? How old the clam is, the more rings the older the clam. Name the clam’s siphons. 1. incurrent siphon 2. excurrent siphon What holds the two shells together? hinge ligaments What muscles open and close the clam? Adductor muscles
What are the siphons of a clam?
How old the clam is, the more rings the older the clam. Name the clam’s siphons. 1. incurrent siphon 2. excurrent siphon What holds the two shells together? hinge ligaments What muscles open and close the clam? Adductor muscles Describe the lining of the shell. its soft,smooth, and protects the shell