Module #13: Phylum Chordata Flashcards Preview

Exploring Creation with Biology > Module #13: Phylum Chordata > Flashcards

Flashcards in Module #13: Phylum Chordata Deck (30)
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1

Notochord

A rod of tough, flexible material that runs the length of a creature's body, providing the majority of it's support

2

Subphylum Urochordata

Contains creatures that have notochords through the larva stage, but then they disappear

3

Subphylum Cephelochordata

Contains creatures with notochords through their entire lives

4

Vertebrat

Contains creatures that have notochords during early development, but it turns into a true backbone before the animal is born or hatched

5

Vertebrae

Segments of bone or some other hard substance that are arranged into a backbone

6

Endoskeleton

A skeleton on the inside of a creature's body, typically composed of bone or cartilage

7

Bone marrow

A soft tissue inside the bone that produces blood cells

8

Axial skeleton

The portion of the skeleton that supports and protects the head, neck, and trunk

9

Appendicular skeleton

The portion of the skeleton that attaches to the axial skeleton and has the limbs attached to it

10

Closed circulatory system

A circulatory system in which the oxygen-carrying blood cells never leave the blood vessels

11

Arteries

Blood vessels that carry blood away from the heart

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Capillaries

Tiny, thin-walled blood vessels that allow the exchange of gasses and nutrients between the blood vessels and the cells of the body

13

Veins

Blood vessels that carry blood back to the heart

14

Olfactory lobes

The lobes of the brain that receive signals from the receptors in the nose

15

Cerebrum

The lobes of the brain that integrate sensory information and coordinate the creature's response to that information

16

Optic lobes

The lobes of the brain that receive signals from the receptors in the eyes

17

Cerebellum

The lobe that controls involuntary actions and refines muscle movement

18

Medulla oblongata

The lobes that coordinate vital functions, such as those of the circulatory and respiratory systems, and transport signals from the brain to the spinal cord

19

Internal fertilization

The process by which the male places sperm inside the female's body, where the eggs are fertilized

20

External fertilization

The process by which the female lays eggs and the male fertilizes them once they are outside of the female

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Oviparous development

Development that occurs in an egg that is hatched outside the female's body

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Ovoviviparous development

Development that occurs in an egg that is hatched inside the female's body

23

Viviparous development

Development that occurs inside the female, allowing the offspring to gain nutrients and vital substances from the mother through a placenta

24

Anadromous

A life cycle in which creatures are hatched in fresh water, migrate to salt water as adults, and then go back to fresh water in order to reproduce

25

Bile

A mixture of salts and phospholipids that aid in the breakdown of fat

26

Atrium

A heart chamber that receives blood

27

Ventricle

A heart chamber from which blood is pumped out

28

Ectothermic

Lacking an internal mechanism for regulating body heat

29

Hibernation

A state of extremely low metabolism and respiration, accompanied by lower-than-normal body temperatures

30

Six amphibious common characteristics

Endoskeleton typically made of bone, smooth skin with many capillaries and pigments, two pairs of limbs with webbed feet, as many as four organs for respiration, three chambered heart, oviparous with external fertilization