Bio

4. These are ovoid cells in the CNS that can transform into a phagocytic macrophage to clean neuronal debris and wastes.
13. includes all the communities interacting with one another and with their environment
14. tissue characterized by the presence of ground substances and fibers that support, bind, and protect organs.
15. a junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
17. a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body.
18. includes all the different kinds of ecosystem
19. cambium that gives rise to secondary xylem and phloem.
20. also reflects excess light.
21. the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.

1. located at the root tips (right) are responsible for the primary growth of plants.
2. the basic unit of the nervous system, consists of structures that can conduct electrochemical signals as a form of information.
3. formed by different organ systems that create complex interactions with one another to maintain balance or homeostasis, and sustain life
5. These are star-shaped cells that support and control the chemical environment around the neurons.
6. are epidermal outgrowths responsible for protecting the plants from water loss.
7. are composed of nondividing cells.
8. groups of cells that work together to perform a specialized function
9. are found in the growing areas of plants.
10. distinct and specialized subcellular structures that contribute to the cell’s maintenance and reproduction; membrane-bound structures in eukaryotic cells
11. organisms that belong to the same species and live in the same area
12. tissue that contain networks of nerve cells that possess irritability and conductivity to allow the transmission and reception of electrochemical impulses.
16. type of animal tissue that forms the inner and outer lining of organs, the covering in surfaces, and the primary glandular tissue of the body.