Mollusks Annelids
... FEEDING Mollusks have evolved many types of feeding mechanisms and feed on many kinds of food. In fact it would be simpler to list the few things these animals do not eat than it would be to describe everything they can feed on! Every mode of feeding is seen in the phylum Mollusca. Most mollusks are ...
... FEEDING Mollusks have evolved many types of feeding mechanisms and feed on many kinds of food. In fact it would be simpler to list the few things these animals do not eat than it would be to describe everything they can feed on! Every mode of feeding is seen in the phylum Mollusca. Most mollusks are ...
Chapter 33: Mammals
... Female mammals have mammary glands, which produce milk to nourish the young for some time after they are born Mammary glands, which give mammals their name, are probably the most important characteristic that scientists use to include an animal in class Mammalia ...
... Female mammals have mammary glands, which produce milk to nourish the young for some time after they are born Mammary glands, which give mammals their name, are probably the most important characteristic that scientists use to include an animal in class Mammalia ...
Chapter 25 Worms and Mollusks
... tree, while roundworms are on the pseudocoe-lomate branch. However, flatworms and roundworms both have bilateral symmetry–they can be divided along only one plane into mirror-image halves. Bilateral symmetry is a major evolutionary step that allows parts of the body to evolve different organs. Anima ...
... tree, while roundworms are on the pseudocoe-lomate branch. However, flatworms and roundworms both have bilateral symmetry–they can be divided along only one plane into mirror-image halves. Bilateral symmetry is a major evolutionary step that allows parts of the body to evolve different organs. Anima ...
Dissection Lab II (week 3)
... the thorax. Identify the nerve cord which is a transparent pair of parallel tubes which connect a chain of ganglia on the floor of the perineural sinus. To make the nerve cord more visible pour or pipette out any excess saline solution and bath the area in isopropanol. This will make the nerve tissu ...
... the thorax. Identify the nerve cord which is a transparent pair of parallel tubes which connect a chain of ganglia on the floor of the perineural sinus. To make the nerve cord more visible pour or pipette out any excess saline solution and bath the area in isopropanol. This will make the nerve tissu ...
Mammals - ABCTeach
... the most primitive animal in this group. The females produce milk which is released from mammary glands found all over her body rather than from teats. ...
... the most primitive animal in this group. The females produce milk which is released from mammary glands found all over her body rather than from teats. ...
BONELESS BEAUTIES
... from their head, eight arms and two retractile tentacles. Like the octopus, cuttlefish have large and complex eyes that focus by changing the shape of the eyeball. Cuttlefish have a chalk-like internal shell called a cuttlebone that helps give shape to the body or mantel. The cuttlebones are not rea ...
... from their head, eight arms and two retractile tentacles. Like the octopus, cuttlefish have large and complex eyes that focus by changing the shape of the eyeball. Cuttlefish have a chalk-like internal shell called a cuttlebone that helps give shape to the body or mantel. The cuttlebones are not rea ...
Chapter 28: Arthropods
... its exoskeleton must be to support its larger muscles. Thus, the weight of the exoskeleton limits the size of arthropods. However, many terrestrial and flying arthropods have adapted to their habitats by having a thinner, lighterweight exoskeleton, which offers less protection but allows the animal ...
... its exoskeleton must be to support its larger muscles. Thus, the weight of the exoskeleton limits the size of arthropods. However, many terrestrial and flying arthropods have adapted to their habitats by having a thinner, lighterweight exoskeleton, which offers less protection but allows the animal ...
ontogeny of cardiovascular and respiratory
... animals are big" is a truism, but the implications for studies of the developmentof cardio-respiratory physiology are often not recognized (or, if recognized, are often avoided). A vast bodyof literature deals with the considerable influence of body masson physiologic processes in all vertebrates (3 ...
... animals are big" is a truism, but the implications for studies of the developmentof cardio-respiratory physiology are often not recognized (or, if recognized, are often avoided). A vast bodyof literature deals with the considerable influence of body masson physiologic processes in all vertebrates (3 ...
The Development and Structure of the Anterior Region of the Body
... lateral region of the larva (fig. 1, B and c). The patches of yellow-brown pigment increase in number and are irregularly scattered throughout the ectodermal layer. At this stage a weak telotroch may also be seen and the bright red pigment of the eye-cups has appeared. The chaetae, which are from th ...
... lateral region of the larva (fig. 1, B and c). The patches of yellow-brown pigment increase in number and are irregularly scattered throughout the ectodermal layer. At this stage a weak telotroch may also be seen and the bright red pigment of the eye-cups has appeared. The chaetae, which are from th ...
ARTHROPOD/ENIGMATICS LABORATORIES Phylum Arthropoda
... Be sure you can key Limulus to class using the key at the beginning of the handout. Limulus lives on soft bottoms and is a carnivore/scavenger. Food is moved into the mouth region with the chelicera and walking legs and then ground by the gnathobases before entering the mouth. Like other arthropods, ...
... Be sure you can key Limulus to class using the key at the beginning of the handout. Limulus lives on soft bottoms and is a carnivore/scavenger. Food is moved into the mouth region with the chelicera and walking legs and then ground by the gnathobases before entering the mouth. Like other arthropods, ...
Biological synopsis of the European Sea Squirt
... cm (Berrill 1928; Picton and Morrow 2010). Once attached, they feed on suspended particles in the water column. Ascidiella aspersa may be mistaken for many other species. When covered in debris, it resembles the clubbed tunicate Styela clava, but this species has two siphons in close proximity, whe ...
... cm (Berrill 1928; Picton and Morrow 2010). Once attached, they feed on suspended particles in the water column. Ascidiella aspersa may be mistaken for many other species. When covered in debris, it resembles the clubbed tunicate Styela clava, but this species has two siphons in close proximity, whe ...
The Phylogenetic Position of Entoprocta
... two coelomic systems in the lophophore, a large brachial canal which is restricted to the base of the lophophore and a small brachial canal which sends a canal into each tentacle and which represents the mesocoel (at least in Neocrania, as demonstrated by its ontogeny, see Nielsen, 1991). On the con ...
... two coelomic systems in the lophophore, a large brachial canal which is restricted to the base of the lophophore and a small brachial canal which sends a canal into each tentacle and which represents the mesocoel (at least in Neocrania, as demonstrated by its ontogeny, see Nielsen, 1991). On the con ...
Mammals - Meade USD 226
... Mammals are endotherms, generating heat internally through the rapid metabolism of food. Because a mammal’s body temperature remains relatively constant regardless of the temperature of its surroundings, mammals can be active at any time of the day or night. They also can live in very cold climates. ...
... Mammals are endotherms, generating heat internally through the rapid metabolism of food. Because a mammal’s body temperature remains relatively constant regardless of the temperature of its surroundings, mammals can be active at any time of the day or night. They also can live in very cold climates. ...
Snorkeler`s Guide
... Australia. They are usually seen when less than 1m long, but can grow to 1.65m. Port Jackson sharks rest in caves and under ledges during the day, and search for food at night, Main food items include sea urchins, crabs, molluscs, and small fishes. These sharks migrate regularly, and aggregate for b ...
... Australia. They are usually seen when less than 1m long, but can grow to 1.65m. Port Jackson sharks rest in caves and under ledges during the day, and search for food at night, Main food items include sea urchins, crabs, molluscs, and small fishes. These sharks migrate regularly, and aggregate for b ...
The Phylum Annelida: A Short Introduction
... muscles in these segments contract, the sharp increase in fluid pressure from all these segments everts the pharynx very quickly. Two families, the Eunicidae and Phyllodocidae, have evolved jaws, which can be used for seizing prey, biting off pieces of vegetation, or grasping dead and decaying matte ...
... muscles in these segments contract, the sharp increase in fluid pressure from all these segments everts the pharynx very quickly. Two families, the Eunicidae and Phyllodocidae, have evolved jaws, which can be used for seizing prey, biting off pieces of vegetation, or grasping dead and decaying matte ...
Invertebrates
... You might think that sponges don’t look like animals at all. They don’t have a head or legs. Internally, they do not have brains, stomachs, or other organs. This is because sponges evolved much earlier than other animals. In fact, sponges do not even have true tissues. Instead, their bodies are made ...
... You might think that sponges don’t look like animals at all. They don’t have a head or legs. Internally, they do not have brains, stomachs, or other organs. This is because sponges evolved much earlier than other animals. In fact, sponges do not even have true tissues. Instead, their bodies are made ...
Lesson Overview - Southgate Schools
... Many aquatic invertebrates have a larval stage, which looks nothing like an adult. These larvae often swim or drift in open water before undergoing metamorphosis and assuming their adult form. Members of some phyla, such as cnidarians, have a single larval stage. Other groups, such as crustaceans, m ...
... Many aquatic invertebrates have a larval stage, which looks nothing like an adult. These larvae often swim or drift in open water before undergoing metamorphosis and assuming their adult form. Members of some phyla, such as cnidarians, have a single larval stage. Other groups, such as crustaceans, m ...
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... • Parapodia are paired, fleshy outgrowths which aid in feeding and locomotion. ...
... • Parapodia are paired, fleshy outgrowths which aid in feeding and locomotion. ...
18.1 Sponges, Cnidarians, Flatworms
... endoskeleton. They lack tissues and body symmetry. Adult sponges are sessile filter feeders. Sponge larvae have cilia for swimming. • Cnidarians include jellyfish and corals. They are aquatic invertebrates. They have tissues and radial symmetry. They also have tentacles with stingers. There are two ...
... endoskeleton. They lack tissues and body symmetry. Adult sponges are sessile filter feeders. Sponge larvae have cilia for swimming. • Cnidarians include jellyfish and corals. They are aquatic invertebrates. They have tissues and radial symmetry. They also have tentacles with stingers. There are two ...
The Pork Tapeworm Taenia solium
... Pigs are the intermediate, or secondary hosts. They become infected when they ingest eggs in human faeces or infected vegetation. Once inside, the tapeworm eggs hatch into motile larvae (oncospheres) and attach to the intestinal wall. 5 The larvae penetrate the intestine and travel through blood and ...
... Pigs are the intermediate, or secondary hosts. They become infected when they ingest eggs in human faeces or infected vegetation. Once inside, the tapeworm eggs hatch into motile larvae (oncospheres) and attach to the intestinal wall. 5 The larvae penetrate the intestine and travel through blood and ...
document
... have a pair of appendages called parapodia, which can be used for swimming or crawling over corals and the bottom of the sea. ...
... have a pair of appendages called parapodia, which can be used for swimming or crawling over corals and the bottom of the sea. ...
Insect Relatives, Panarthropoda – Insect Relatives
... because the anterior sensory appendages typically found on the head are combined with the walking legs. The use of the term can be confusing particularly in reference to developmental stages: for example, when the cephalothorax results from the fusion of two tagmata; the head and some segments devel ...
... because the anterior sensory appendages typically found on the head are combined with the walking legs. The use of the term can be confusing particularly in reference to developmental stages: for example, when the cephalothorax results from the fusion of two tagmata; the head and some segments devel ...
respiratory or ventilatory system
... metabolic rate, many insects have highly discontinuous patterns of gas exchange, DISCONTINUOUS BREATHING including long periods when the spiracles are fully closed. Two explanations have been put forward to explain this behaviour: first, that this pattern INpreviously INSECTS: serves to reduce respi ...
... metabolic rate, many insects have highly discontinuous patterns of gas exchange, DISCONTINUOUS BREATHING including long periods when the spiracles are fully closed. Two explanations have been put forward to explain this behaviour: first, that this pattern INpreviously INSECTS: serves to reduce respi ...
Horse-fly
Horse-flies (for other names, see common names) are true flies in the family Tabanidae in the insect order Diptera. They are often large and agile in flight, and the females bite animals, including humans, in order to obtain blood. They prefer to fly in sunlight, avoiding dark and shady areas, and are inactive at night. They are found all over the world except for some islands and the polar regions.Adult horse-flies feed on nectar and plant exudates; the males have weak mouthparts and only the females bite animals to obtain enough protein from blood to produce eggs. The mouthparts of females are formed into a stout stabbing organ with two pairs of sharp cutting blades, and a spongelike part used to lap up the blood that flows from the wound. The larvae are predaceous and grow in semiaquatic habitats.Female horse-flies can transfer blood-borne diseases from one animal to another through their feeding habit. In areas where diseases occur, they have been known to carry equine infectious anaemia virus, some trypanosomes, the filarial worm Loa loa, anthrax among cattle and sheep, and tularemia. As well as making life outdoors uncomfortable for humans, they can reduce growth rates in cattle and lower the milk output of cows if suitable shelters are not provided.Horse-flies have appeared in literature since Aeschylus in Ancient Greece mentioned them driving people to madness through their persistent pursuit. Shakespeare uses the theme of the maddening gadfly in his plays King Lear and Antony and Cleopatra.