Across
- 1. the ability to differentiate into specialised cells
- 3. a flattened circular organ in the uterus of pregnant eutherian mammals, nourishing and maintaining the fetus through the umbilical cord.
- 5. egg or sperm cells
- 8. the innermost gem layer of a human or animal embryo
- 9. a birth defect that can result from exposure to certain chemicals during critical periods of organ development is known as _____________ malformation
- 16. organs and processors of the body that provide resistance against infection and toxins; _______ system.
- 19. refers to a cell that can differentiate into a number of closely related cell types
- 20. structure in an ovary where an egg develops
- 21. once all three germ players have formed, all vertebrate are said to be ____________
- 23. cells or tissues obtained from the same individual are considered ___________
- 24. the process or period of developing inside the womb from fertilisation to birth
- 26. refers to a cell that can differentiate into all different cell types
- 27. the outermost germ layer of a human or animal embryo
- 29. the ingestion of bacteria or other material by phagocytes and amoeboid protozoans.
- 31. refers to a cell that can differentiate into many different cell types
- 32. the union of egg and sperm to for a zygote is known as__________
- 35. early stage of a developing organism; in humans includes the first 8 weeks of development
- 36. the stage before birth is known as _____________
- 38. a scientific testing room
- 39. the middle germ layer of a human of animal embryo
- 40. a fertilised egg that results from the fusion of haploid gametes is referred to as a________
Down
- 2. a gene that signals cells to continue dividing
- 4. cells that are undifferentiated and found in multicellular organisms are known as__________
- 6. a potential source of embryonic stem cells generated from parthenogenesis
- 7. derived from bone marrow
- 10. synonym for adult stem cells
- 11. a type of partially differentiated, usually unipotent cell that has lost most or all of the stem cell multipotency; ___________ cell
- 12. an agent that can supress or fervent the immune response
- 13. flexible structure that contains blood vessels that attaches a human or other mammalian fetus to the placenta during gestation
- 14. programmed cell death
- 15. the period after implantation, during which all of the major organs and structures within the growing mammal are formed is known as the __________ phase
- 17. an agent or factor that causes development abnormalities and malformations in embryos
- 18. a modified blastula that is characteristic of placental mammals
- 22. grown or propagated in an artificial medium
- 24. complex cell migrations that reorganise the inner cell mass of the embryo blastocyst into a three layered structure is referred to as _____________
- 25. synonym for an unborn child
- 28. a type of cloning which involves the creation of the embryo, through a technique of somatic nuclear transfer in order to obtain stem cells from that embryo
- 30. a regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action
- 33. A periodic release of the ovum from the ovary
- 34. a person who provides blood, bone marrow tissue or other biological tissues for transfusion or transplantation
- 37. relating to or denoting the tissue responsible for producing lymphocytes and antibodies