Chapter 5 & 6

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Across
  1. 1. The innermost layer.
  2. 4. Are scales with comb-like edge found in higher order teleost fishes, such as perch and sunfish.
  3. 6. Are slender keratinous filaments.
  4. 8. The tissue lining blood and lymph vessels is called.
  5. 13. Yolk platelets collect in the ovum to produce a macrolecithal egg.
  6. 16. It also contains most of the hair's pigment, giving the hair its color.
  7. 17. Are formed of closely adjoined cells with very little extracellular matrix between them.
  8. 18. Is a general coating of the body beneath the skin, made up of loose areolar tissue with varying amounts of fat.
  9. 20. The thick layer of living tissue below the epidermis which forms the true skin, containing blood capillaries, nerve endings, sweat glands, hair follicles, and other structures.
  10. 21. Is nearest to the uterine cavity and contains the lining cells and the necks of the uterine glands; its stroma is relatively dense.
  11. 24. Also called the cell membrane.
  12. 26. Is a patch of featherless skin that is visible on the underside of birds during the nesting season.
  13. 28. Informally known as the preen gland or the oil gland, is a bilobed sebaceous gland possessed by the majority of birds.
  14. 32. The outermost layer of cells or tissue of an embryo in early development.
  15. 33. The process by which the three germ tissue layers of the embryo.
  16. 34. Lies between the dermis and underlying tissues and organs.
  17. 37. Are covered with highly reflective scales which function as small mirrors and give the appearance of silvered glass.
  18. 38. Also known as bronchiolar exocrine cells.
  19. 39. Composed of more than one layer of cells.
  20. 40. Division of cells in the early embryo.
Down
  1. 2. The surface epithelium of the skin, overlying the dermis.
  2. 3. They are specialized smooth muscle cells mainly in the walls of the afferent arterioles (and some in the efferent arterioles) that deliver blood to the glomerulus.
  3. 5. Pores are a part of a holocrine secretory gland found on the inside of the thighs of certain lizards and amphisbaenians which releases pheromones to attract mates or mark territory.
  4. 7. Also called lancelet.
  5. 9. Use the merocrine method of secretion, secreting vesicles into a duct, but may use apocrine methods, budding off their secretions, when under stress.
  6. 10. The blastocyst is composed of a single layer of protodermal cells spread around the inside wall of the zona pellucida.
  7. 11. Is a thin, fibrous, extracellular matrix that separates the lining of an internal or external body surface from underlying connective tissue in metazoans.
  8. 12. The fusion of haploid gametes, egg and sperm, to form the diploid zygote.
  9. 14. Is a layer of extracellular matrix secreted by the epithelial cells, on which the epithelium sits.
  10. 15. The middle layer.
  11. 19. Is the inside space of a tubular structure, such as an artery or intestine.
  12. 22. Lines the surface of the body wall and abdominal organs.
  13. 23. Are smooth-edged scales predominately found in lower order teleost fishes, such as salmon, carp and other soft fin rayed fish.
  14. 25. Are small vertebrates that need water.
  15. 27. The differentiation of cells into specialized tissues and organs during growth.
  16. 29. Also known as interstitial cells.
  17. 30. Are usually rhomboid in shape and have articulating peg and socket joints between them.
  18. 31. The innermost layer of the epidermis, and contains small round cells called.
  19. 35. Is the study of relationships among different groups of organisms and their evolutionary development.
  20. 36. Is the area of the skin of the human anatomy that is mainly supplied by branches of a single spinal sensory nerve root.