Describe the movement of food from the current siphon through the digestive system of the clam. Are these siphons analogous, homologous, or completely unrelated to each other besides both being termed âsiphonâ? The mantle, a thin membrane surrounding the body of the clam, secretes the shell. 14. 11. Select Page. Describe the shape of the clam's foot. Describe the clamâs foot. Describe the inside lining of the shell. The clamâs siphon and remaining soft-body tissue. The flow and un-steady patterns in the time records of vertical velocity near the tip of the excurrent siphon were an- 8. The purpose of this lab is to identify the internal and external structures of a mollusk by dissecting a clam. The food, collected by tentacles, is then transported to the mouth in a ciliate groove. Where are the palps found and what is their function? The function is movement, feeding, respiration, and reproduction. 9. The gills also draw oxygen from the water flow. Mollusks also have a radula or file-like organ for feeding, a mantle that may ⦠Continue reading "Clam Dissection" Internal Clam 1 Mantle Shell Anatomy. What holds the two shells together? that carries water into the clam and the more dorsal opening is the . Pericardium cavity ... FdiFeeding Cilia on incurrent siphon and gill filaments move Na+/K+-ATPase (NKA) is essential for maintaining the Na+ and K+ gradients, and supporting the secondary active transport of certain ions/molecules, across the plasma membrane of animal cells. These control the opening and closing of the shells. What is its function? They will be able to identify the major internal organs o f a clam and their functions related to swimming digestion and respiration. Called the nacre, soft and smooth and protects the shell. The more ventral opening is the incurrent siphon that carries water into the clam and the more dorsal opening is the excurrent siphon where wastes & water leave. The coelom is reduced and limited to the region near the heart. The length of the siphon and shell length were measured to the nearest 1 mm. What is a muscle clam? Describe the movement of food from the current siphon through the digestive system of the clam. 8. Razor clams can be very large coming in at the size of a beer bottle. The blood pigment of mollusks is hemocyanin, not hemoglobin. Adductor. Ant. Excurrent and Incurrent. Gas exchange is the function of the respiratory system. 3. Other than that, most other, more highly developed, bivalves feed by filtering their respiration water. Describe the inside lining of the shell. The larvae of several kinds of insects, including mosquitoes, tabanid flies, and Belostomatidae) live in the water and breathe through a tubular organ called a siphon (which functions as a snorkel). Clam shell is the umbo and it is from the hinge area that the clam extends as it grows. A retractable foot, a siphon for sucking up water, powerful muscles, and, sometimes, a pearl. Most mollusks have an open circulatory system but cephalopods (squids, octopus) have a closed circulatory system.. Name the clamâs siphons. Describe the clam's foot. What are the parts of the clam's nervous system? In mollusks that lack shells, such as the slug, the mantle is completely visible. 17. 9. Use your probe to trace the path of food wastes from the incurrent siphon through the clam to the excurrent siphon. What is the function of the tooth-like projections at the dorsal edge of the clamâs valves? How do clams breathe? They Guide food into the clamâs mouth * 10. 4. Where is the mantle located in the clam and what is its function? In mollusks that have shells, such as clams, mussels, and snails, the mantle is what secretes calcium carbonate and a matrix to form the mollusk's shell. The siphon is part of the mantle of the mollusc, and the water flow is directed to (or from) the mantle cavity. What holds the two shells together? Clam is a common name for several kinds of bivalve molluscs.The word is often applied only to those that are edible and live as infauna, spending most of their lives halfway buried in the sand of the seafloor or riverbeds.Clams have two shells of equal size connected by two adductor muscles and have a powerful burrowing foot. There may be a radula, a structure that resembles a tongue but contains hard plates and is often used for scraping food. Why are clam⦠The more ventral opening is the incurrent siphon that carries water into the clam and the more dorsal opening is the excurrent siphon where wastes water leave. 10. 16. NorthStar Academy 2. 13. As mollusks develop from a fertilized egg to an adult, most pass through a larval stage called the trocophore. What holds the two shells together? *In between the gills and the foot. The excurrent ve-locity was measured via the non-intrusive particle image velocimetry technique. In bi-valves, the siphons are paired. Excurrent and Incurrent. Hinge Ligaments. What muscles open & close the clam? The oldest part of the clam shell is the umbo, and it is from the hinge area that the clam ⦠were separated into two pre-weighed aluminium pans, dried. Moves water throughout the clam using cilia to create a current through the siphons. 1 - 8).They ranged in size from a few millimeters to 7 cm long and consist of swellings of the ⦠What is the function of the tooth-like projections at the dorsal edge of the clamâs valves? Each clam then fills its water chambers and closes the incurrent syphon. Hinge Ligaments. Clam Dissection Introduction The phylum Mollusca includes snails, clams, chitons, slugs, limpets, octopi, and squid. How is the form and function of the siphon(s) different in the clam and the squid? Label the internal structures of the clam. Figure 1 Figure 1 3. A siphon is found in octopus, squid, and in some snails and clams. Clams draw water into the mantle cavity through the incurrent siphon.