Animal Crossword

2. an animal in which internal physiological sources of heat are of relatively small or of quite negligible importance in controlling body temperature
3. a sexually reproducing organism that produces both male and female gametes
4. one of two principal body types occurring in members of the invertebrate animal phylum Cnidaria
5. network of water vessels in the body, the tube feet being operated by hydraulic pressure within the vessels.
7. property of being divisible into symmetrical halves on either side of a unique plane.
8. lack of equality or equivalence between parts or aspects of something; lack of symmetry.
9. flexible connective tissue found in various forms in the larynx and respiratory tract, in structures such as the external ear, and in the articulating surfaces of joints
13. gas-filled organ in the dorsal coelomic cavity of fish.
15. a projecting mass of swollen and hypertrophied or tumorous membrane
16. flattened circular organ in the uterus of pregnant eutherian mammals, nourishing and maintaining the fetus through the umbilical cord.
18. endothermic process is any thermodynamic process with an increase in the enthalpy H of the system
20. internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.

1. constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla.
4. shed old feathers, hair, or skin, or an old shell, to make way for a new growth.
6. animal of a large group distinguished by the possession of a backbone or spinal column, including mammals, birds, reptiles, amphibians, and fishes.
10. errestrially adapted egg, characterized by a shell and extra-embryonic membranes
11. rigid external covering for the body in some invertebrate animals, especially arthropods, providing both support and protection.
12. milk-producing gland of women or other female mammals.
14. symmetry around a central axis, as in a starfish or a tulip flower
17. a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site
19. relating to, or occurring at the bottom of a body of water.