Solve these clues to fill the grid.
- The entire physical structure of an organism
- 1 Across
- To perceive via the auditory sense
- 3 Across
- The sensory and control apparatus consisting of a network of nerve cells
- 4 Across
- Pertaining to ___
- 7 Across
- Tiniest unit of living things (plural)
- 9 Across
- Either of two saclike respiratory organs in the chest of vertebrates (plural)
- 10 Across
- The sensation that results when ___ buds in the tongue and throat convey information about
- 13 Across
- Either of two bean-shaped excretory organs that filter wastes from the blood and excrete them
- 14 Across
- Red liquid pumped around the body by the heart
- 1 Down
- The process of generating offspring
- 2 Down
- Organ that pumps blood around the body
- 3 Down
- Of or relating to or forming or attached to a ___
- 5 Down
- The region of the body of a vertebrate between the thorax and the pelvis
- 6 Down
- The hard structure that provides a frame for the body of an animal
- 8 Down
- The bony skeleton of the head of vertebrates
- 11 Down
- The sense organ for hearing and equilibrium
- 12 Down