Bio CH 24

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Author:
Risette
ID:
182036
Filename:
Bio CH 24
Updated:
2012-11-06 10:35:19
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Bio 24
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Description:
Bio Ch 24
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  1. amnion
    one of the embryonic membranes of reptiles(including birds) and mammals; encloses a fluid-filled cavity that envelops the embryo
  2. amniotic egg
    the egg of reptiles, including birds; contains a membrane, the amnion, that surrounds the embryo, enclosing it in a watery environment and allowing the egg to be laid on dry land
  3. cartilage
    a form of connective tissue that forms portions of the skeleton; consists of chondrocytes and their extracellular secretion of collagen
  4. craniate
    an animal that has a skull
  5. mammary gland
    a milk-producing gland used by female mammals to nourish their young
  6. marsupial
    a member of the clade Marsupalia, which includes mammals whose young are born at an extremely immature stage and undergo further development in a pouch, where they remain attached to a mammary gland; like kangaroos, opossums, and koalas
  7. monotreme
    a member of the clade Monotremata, which includes mammals that can lay eggs; include platypuses and spiny anteaters
  8. nerve cord
    a major nervous pathway consisting of a cord of nervous tissue extending lengthwise through the body, paired in many vertebrates and unpaired in chordates
  9. notochord
    a stiff but somewhat flexible, supportive rod that extends along the head-to-tail axis and is found in all members of the phylum Chordata at some stage of development
  10. pharyngeal gill slit
    one of a series of openings, located just posterior to the mouth, that connects the throat to the outside environment; present (at some stage of life) in all chordates
  11. placenta
    in mammals, a structure formed by a complex interweaving of the uterine lining and the embryonic membranes, especially the chorion; functions in gas, nutrient, and wastes exchanges between embryonic and maternal circulatory systems, and also secretes the hormones estrogen and progesterone, which are essential to maintaining pregnancy
  12. placental
    referring to a mammals possessing a complex placenta
  13. post-anal tail
    a tail that extends beyond the anus, and contains muscle tissue and the most posterior part of the nerve cord; found in all chordates at some stage of development
  14. vertebral column
    a column of serially arranged skeletal units (the vertebrae) that enclose the nerve cord in vertebrates; the backbone
  15. vertebrate
    an animal that has a vertebral column

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