122 Invertebrates_ general vocab.txt

• animals with no back bone
• not a fair description

body plan

• animals whose mouth develops first then anus
• examples: Molluscs and Anthropods

• animals whose anus forms first then mouths
• examples: humans

• Ectoderm (outer)
• Mesoderm (middle)
• Endoderm (inner)

Body with two tissue types: Endodermic and ectodermic tissues

Body that contains 3 tissue types: endodermic, mesodermic and ectoermic tissues

patterns of cells in early embryos

• spiral cleavage: Asymmetrical and determinate cells
• radial cleavage: Symmetrical and indeterminate cells

fluid filled sac in mesoderm that keeps organs intact

• Coelomate: contains ceolom and organisms have two body openings (1 intake and 1 outtake)
• Aceolomate: no ceolom and organisms have one body opening (1 for intake and outtake)

used blood flows opposite of new blood flow. Maximizes oxygen transfer

• Schizochoely: mesoderm splits up to form coelom
• Enterocoely: archenteron folds to form coelom

• carries both male and female games. Can be simultaneous or sequential
• protoandry (male to female) or protogyny (female to male)

• mono - single sexed
• dio - both sexes

new growth develops from the posterior end

 type of tubular excretory system that has internal openings that collect body fluids

layers of circular and longitudinal muscles, together with the water in the gastrovascular cavity, that enable movement

A cavity or series of spaces between the organs of organisms with open circulatory systems

symmetry at the left and right side

old and new blood flowing in the same direction

thick material found in exoskeletons

a network of dead-end tubules lacking internal openings for osmoregulation

simple eye

movements of individual cells and sheets of cells of the embryo.