Nerve activates contraction
... their shells entirely and may have chemical defenses against predators. • Many gastropods have distinct heads with eyes at the tips of tentacles المالمس الرأسية. • They move by their foot. • Some species are predators. ...
... their shells entirely and may have chemical defenses against predators. • Many gastropods have distinct heads with eyes at the tips of tentacles المالمس الرأسية. • They move by their foot. • Some species are predators. ...
PHYLUM MOLLUSCA (2nd largest, 100,000 spp) Snails, slugs
... Free-swimming larva (Trochophore larva) - Some moluscs have further laval development (e.g., veliger) Class Gastropoda ("stomach foot") Torsion (180° twist of body results in anus over head Reduced or absent right gill, nephridium, & auricle Subclass Prosobranchia ("forward gill") Contains species w ...
... Free-swimming larva (Trochophore larva) - Some moluscs have further laval development (e.g., veliger) Class Gastropoda ("stomach foot") Torsion (180° twist of body results in anus over head Reduced or absent right gill, nephridium, & auricle Subclass Prosobranchia ("forward gill") Contains species w ...
Chicken Foot Dissection
... the bone. Muscles move in antagonistic (opposite) pairs to move a bone. So for every movement there should be a pair of tendons. One muscle and tendon to contract and close the joint, and another tendon and muscle to relax or open the joint. The chicken foot has long easy to reach tendons which make ...
... the bone. Muscles move in antagonistic (opposite) pairs to move a bone. So for every movement there should be a pair of tendons. One muscle and tendon to contract and close the joint, and another tendon and muscle to relax or open the joint. The chicken foot has long easy to reach tendons which make ...
Phylum Mollusca
... – May lack a shell (like an octopus) – Shell may be reduced to a stiffening rod (like the squid or nautilus) – The foot is highly modified to form a group of tentacles around the mouth. – They are found in deep and shallow waters along many coasts. – Squids & Nautilus are free-swimming and move very ...
... – May lack a shell (like an octopus) – Shell may be reduced to a stiffening rod (like the squid or nautilus) – The foot is highly modified to form a group of tentacles around the mouth. – They are found in deep and shallow waters along many coasts. – Squids & Nautilus are free-swimming and move very ...
Incomplete outline Mollusks and Annelids
... Mollusks have a true ____________, (first group to have). The gut and other internal organs are suspended from the body wall and cushioned by the __________ within. Symmetry: _______________ True coelom - diagram Mollusks body plan 3 part body plan: 1. visceral mass – center section with ___________ ...
... Mollusks have a true ____________, (first group to have). The gut and other internal organs are suspended from the body wall and cushioned by the __________ within. Symmetry: _______________ True coelom - diagram Mollusks body plan 3 part body plan: 1. visceral mass – center section with ___________ ...
Phylum Mollusca Ch 12 – Molluscan Success
... open and eggs are released through the oviduct. Fertilized eggs attach to ...
... open and eggs are released through the oviduct. Fertilized eggs attach to ...
Evidence of Evolution Notes
... Evolution the process of change within a population that occurs over a series of generations an attempt to explain why organisms that are so similar in their molecular make-up can be so different in form and function Example: all plants have similar cells. ...
... Evolution the process of change within a population that occurs over a series of generations an attempt to explain why organisms that are so similar in their molecular make-up can be so different in form and function Example: all plants have similar cells. ...
Mollusca and Annelids
... • Some bivalves dig with a strong muscular foot and others use their foot to create strong threads that attach them to rocks ...
... • Some bivalves dig with a strong muscular foot and others use their foot to create strong threads that attach them to rocks ...
Phylum: Mollusca - Perth Beachcombers Education Kit
... absent altogether. Cephalopods are the most intelligent of all invertebrates, with an advanced nervous system, a well-developed head and complex eyes. Polyplacophora Meaning ‘bearer of plates’, the polyplacophorans or chitons are adapted for life on rocky surfaces in the intertidal zone. They are ov ...
... absent altogether. Cephalopods are the most intelligent of all invertebrates, with an advanced nervous system, a well-developed head and complex eyes. Polyplacophora Meaning ‘bearer of plates’, the polyplacophorans or chitons are adapted for life on rocky surfaces in the intertidal zone. They are ov ...
Horse Fossil Capital of the World Questions
... could get far better traction when running at a hard gallop on hard surfaces with a single hard hoof attached to each leg. 8. Define “vestigial”. What part of extinct horse’s foot became vestigial? “Vestigal” means a part of an animal’s anatomy that still is apparent but is non-functional. A good ex ...
... could get far better traction when running at a hard gallop on hard surfaces with a single hard hoof attached to each leg. 8. Define “vestigial”. What part of extinct horse’s foot became vestigial? “Vestigal” means a part of an animal’s anatomy that still is apparent but is non-functional. A good ex ...
Classes of Molluscs - Solon City Schools
... by vigorously flapping their shells and squirting out jets of water. Limatula also moves very vigorously when disturbed. The tentacles around the mantle edge are sticky, very mobile and parts can break off them when the animal is disturbed, leaving a potential predator with a sticky writhing worm-li ...
... by vigorously flapping their shells and squirting out jets of water. Limatula also moves very vigorously when disturbed. The tentacles around the mantle edge are sticky, very mobile and parts can break off them when the animal is disturbed, leaving a potential predator with a sticky writhing worm-li ...
Body organization
... o Name comes from Latin & Greek – Cephalic= “head” , podos = “ foot “. o Cephalopods are typically soft-bodied mollusks in which the head is attached to a single foot. The foot is divided into tentacles or arms. o Cephalopods have eight or more tentacles equipped with sucking disks that grab and hol ...
... o Name comes from Latin & Greek – Cephalic= “head” , podos = “ foot “. o Cephalopods are typically soft-bodied mollusks in which the head is attached to a single foot. The foot is divided into tentacles or arms. o Cephalopods have eight or more tentacles equipped with sucking disks that grab and hol ...
Mollusca Overview - Solon City Schools
... scallops are able to actively move when endangered by vigorously flapping their shells and squirting out jets of water. Limatula also moves very vigorously when disturbed. The tentacles around the mantle edge are sticky, very mobile and parts can break off them when the animal is disturbed, leaving ...
... scallops are able to actively move when endangered by vigorously flapping their shells and squirting out jets of water. Limatula also moves very vigorously when disturbed. The tentacles around the mantle edge are sticky, very mobile and parts can break off them when the animal is disturbed, leaving ...
Evidence of Evolution - Get a Clue with Mrs. Perdue
... This tropical lo moth, once a caterpillar with an honest signal now sports eyespots on its hind wings, which it ...
... This tropical lo moth, once a caterpillar with an honest signal now sports eyespots on its hind wings, which it ...
I. Intro to Mollusks
... -sexual reproduction -radula tongue like structure i. 250,000 teeth ii. Conveyor belt ...
... -sexual reproduction -radula tongue like structure i. 250,000 teeth ii. Conveyor belt ...
Conservative Management of Morton`s Neuroma
... that the shoe width is no longer appropriate. Overpronation also “unlocks” the first metatarsal ray. It becomes hypermobile during pushoff, allowing it to move upward when ground forces are applied and thus transferring some of the push-off force to the lesser rays. This excess workload on the lesse ...
... that the shoe width is no longer appropriate. Overpronation also “unlocks” the first metatarsal ray. It becomes hypermobile during pushoff, allowing it to move upward when ground forces are applied and thus transferring some of the push-off force to the lesser rays. This excess workload on the lesse ...
from Mollus = meaning “Soft” Kingdom: Animalia Phylum: Mollusca
... Some sessile (mussels, oysters) Some use foot to burrow, crawl/ drag selves (clams) ...
... Some sessile (mussels, oysters) Some use foot to burrow, crawl/ drag selves (clams) ...
Fossil record
... function – remains of structures that were functional in ancestors – evidence of change over time • some snakes & whales have pelvis bones & leg bones of walking ancestors • eyes on blind cave fish • human tail bone ...
... function – remains of structures that were functional in ancestors – evidence of change over time • some snakes & whales have pelvis bones & leg bones of walking ancestors • eyes on blind cave fish • human tail bone ...
Mollusca
... • Soft body protected by a shell of calcium carbonate • Very diverse in body structures and habits ...
... • Soft body protected by a shell of calcium carbonate • Very diverse in body structures and habits ...
visceral mass, modified foot, & mantle
... reproduce sexually by doing external fertilization (except for snails which are hermaphrodites) • Nervous- brain, eyes, and nerves • Excretion- nephridia remove wastes ...
... reproduce sexually by doing external fertilization (except for snails which are hermaphrodites) • Nervous- brain, eyes, and nerves • Excretion- nephridia remove wastes ...
Mollusks
... Hard shell, symmetrical halves joined by an elastic hinge ligament Shell is secreted by mantle & is made of three parts ...
... Hard shell, symmetrical halves joined by an elastic hinge ligament Shell is secreted by mantle & is made of three parts ...
Comparative foot morphology
Comparative foot morphology involves comparing the form of distal limb structures of a variety of terrestrial vertebrates. Understanding the role that the foot plays for each type of organism must take account of the differences in body type, foot shape, arrangement of structures, loading conditions and other variables. However, similarities also exist among the feet of many different terrestrial vertebrates. The paw of the dog, the hoof of the horse, the manus (foot) and pes (foot) of the elephant, and the foot of the human all share some common features of structure, organization and function. Their foot structures function as the load-transmission platform which is essential to balance, standing and types of locomotion (such as walking, trotting, galloping and running).The discipline of biomimetics applies the information gained by comparing the foot morphology of a variety of terrestrial vertebrates to human-engineering problems. For instance, it may provide insights that make it possible to alter the foot's load transmission in people who wear an external orthosis because of paralysis from spinal-cord injury, or who use a prosthesis following the diabetes-related amputation of a leg. Such knowledge can be incorporated in technology that improves a person's balance when standing; enables them to walk more efficiently, and to exercise; or otherwise enhances their quality of life by improving their mobility.