Invertebrate Project Crossword

animals without a backbone
what is one common way to identify shapes?
no definite shape
many planes can divide the organism into similar parts
symmetry in which there is a right and left side that are mirror images and anterior and posterior end
animals that have nerve tissue and sensory organs concentrated in the anterior
clusters of neurons (simple brain)
a hollow sphere of cells
toward the head
toward the anus
toward the spine (back)
toward the stomach
to the side
side where the mouth is located
side opposite of the surface where the mouth is located
middle layer; forms the muscles
true body cavity fully lined with mesoderm
animal with no coelom
animal with a "false" coelom only partially lined with mesoderm
animal with a true coelom that is fully lined with mesoderm
larva of cnidarians
larva of mollusks
larva of echinoderms
two main blood vessels heart pumps bold into vessels that open into the body
heart pumps blood through enclosed vessels and capillaries deliver to cells
taking in oxygen, releasing carbon dioxide
coordinates the activies of the animal body
nerve cells that send impulses
network of neurons, very little coordination
how the body maintions its shape
outside skeleton
inside skeleton
the removal of wastes from the body
reproduction only needs 1 parent, offspring are identical
fragmentation and regrowth
reproduction involves the joining of egg and sperm
animals that produce both egg and sperm, have both sexes
sperm is released into water where it fertilizes eggs in the water
sperm and egg join within the body of females
water pressure