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Bio 11 Unit 1 > Animal Unit > Flashcards

Animal Unit Flashcards

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Biology 101 flashcards
1
Q

Invertebrates

A

An animal lacking a backbone and internal skeleton.

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2
Q

Multicellular

A

Consisting of many cells.

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3
Q

Eukaryotic

A

A cell with a definitive nucleus

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4
Q

Phylogeny

A

The evolutionary or ancestral history of organisms.

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5
Q

Deuterostome

A

A division of the animal kingdom which includes the phyla Echinodermata, Chaetognatha, Hemichordata, and Chordata.

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6
Q

Blastula

A

A hollow sphere of cells characteristic of the early metazoan embryo.

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7
Q

Blastopore

A

The opening of the archenteron.

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8
Q

Pinacocytes

A

A flattened polygonal cell occurring in the dermal epithelium of sponges, and lining the exhalant canals.

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9
Q

Amoebocytes

A

One of the wandering ameboid cells in the tissues and fluids of many invertebrates that function in assimilation and excretion.

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10
Q

Platyhelminthes

A

A phylum of invertebrates composed of bilaterally symmetrical, nonsegmented, dorsoventrally flattened worms characterized by lack of coelom, anus, circulatory and respiratory systems, and skeleton.

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11
Q

Trematode

A

A loose grouping of acoelomate, parasitic flatworms of the phylum Platyhelminthes; they exhibit cephalization, bilateral symmetry, and well-developed holdfast structures.

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12
Q

Pharynx

A

A chamber at the oral end of the vertebrate alimentary canal, leading to the esophagus.

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13
Q

Scolex

A

The head of certain tapeworms, typically having a muscular pad with hooks, and two pairs of lateral suckers.

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14
Q

Proglottids

A

One of the segments of a tapeworm.

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15
Q

Nephridia

A

Any of various paired excretory structures present in the Platyhelminthes, Rotifera, Rhynchocoela, Acanthocephala, Priapuloidea, Entoprocta, Gastrotricha, Kinorhyncha, Cephalochorda, and some Archiannelida and Polychaeta.

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16
Q

Hydrostatic skeleton

A

Water contained within the coelenteron and serving a skeletal function in most cnidarian polyps.

17
Q

Gastropoda

A

A large, morphologically diverse class of the phylum Mollusca, containing the snails, slugs, limpets, and conchs.

18
Q

Dioecious

A

Having the male and female reproductive organs on different individuals. Also known as dioic.

19
Q

Hemocyanin

A

A blue respiratory pigment found only in mollusks and in arthropods other than insects.

20
Q

Chromatophores

A

A type of pigment cell found in the integument and certain deeper tissues of lower animals that contains color granules capable of being dispersed and concentrated.

21
Q

Echinodermata

A

A phylum of exclusively marine coelomate animals distinguished from all others by an internal skeleton composed of calcite plates, and a water-vascular system to serve the needs of locomotion, respiration, nutrition, or perception.

22
Q

Ophiuroidea

A

The brittle stars, a subclass of the Asterozoa in which the arms are usually clearly demarcated from the central disk and perform whiplike locomotor movements.

23
Q

Ophiuroidea

A

The brittle stars, a subclass of the Asterozoa in which the arms are usually clearly demarcated from the central disk and perform whiplike locomotor movements.

24
Q

Pedicellaria

A

In echinoids and starfishes, any of various small grasping organs in the form of a beak carried on a stalk.

25
Q

Vertebrates

A

The major subphylum of the phylum Chordata, comprising the backboned animals, including humans

26
Q

Arthropoda

A

The largest phylum in the animal kingdom; adults typically have a segmented body, a sclerotized integument, and many-jointed segmental limbs.

27
Q

Crustacean

A

A class of arthropod animals in the subphylum Mandibulata having jointed feet and mandibles, two pairs of antennae, and segmented, chitin-encased bodies.

28
Q

Chitin

A

A white or colorless amorphous polysaccharide that forms a base for the hard outer integuments of crustaceans, insects, and other invertebrates.

29
Q

Hemocoel

A

An expanded portion of the blood system in arthropods that replaces a portion of the coelom.

30
Q

Spiracles

A

An external breathing orifice of the tracheal system in insects and certain arachnids.

31
Q

Metamorphosis

A

A marked structural change in an animal during postembryonic development

Bio 11 Unit 1 (3 decks)

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