Across
- 2. an abbreviation for the apical ectodermal ridge
- 3. Relating to the membrane that lines the lungs and chest cavity
- 4. Inner most germ layer
- 5. Organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange
- 7. Process in which cells lose their polarity and are able to migrate and move
- 11. Programmed cell death that occurs in multicellular organisms
- 13. Part of the autonomic nervous system that activates the "fight or flight" response
- 14. Embryonic block that gives rise to the axial skeleton and skeletal muscles
- 16. Embryonic structure that gives rise to the vertebrae and rib bones
- 19. Type of melanin that produces reddish-brown pigmentation in the skin and hair
- 20. Cylindrical multinucleated cell formed by the fusion of myoblasts, which develops into a muscle fiber
Down
- 1. Process of blood vessel formation from precursor cells
- 6. is an example of how the body continues development in adulthood, it is the formation of new blood cells
- 8. Relating to a valve located between the left atrium and left ventricle of the heart
- 9. (2 words)a group of related genes that specify regions of the body plan of an embryo along the head-tail axis of animals
- 10. Thickened area of embryonic tissue that gives rise to sensory organs such as the nose, ears, and eyes
- 12. derivative of lateral plate mesoderm, deals with circulatory system
- 15. Precursor cell of a melanocyte
- 17. Flexible rod-like structure that forms the embryonic axial skeleton in chordates
- 18. Middle germ layer