biology

3. first plants with seeds
4. the circulatory fluid of various invertebrate animals that is functionally comparable to the blood and lymph of vertebrates.
6. a structure found inside cells that is involved in making proteins.
10. receptors in the skin and on other organs that detect sensations of touch.
12. relision of egg
13. largest artery in the body

1. a collection of neuronal bodies found in the voluntary and autonomic branches of the peripheral nervous system
2. the main substance in the walls of plant cells, helping plants to remain stiff and upright.
4. an organism that eats other plants or animals for energy and nutrients.
5. -an automatic response of the spinal cord that is critical in protecting the body from harmful stimuli.
7. A column of nerve tissue that runs from the base of the skull down the center of the back.
8. The thin muscle below the lungs and heart that separates the chest from the abdomen.
9. the receiving or input portions of a neuron.
10. a large phylum of invertebrate animals (as snails, clams, and mussels) that have a soft unsegmented body lacking segmented appendages and commonly protected by a calcareous shell.
11. another name for platelets