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Health science
| Question | Answer |
|---|---|
| How is the embryo protected | The placenta acts as a filter and prevents some harmful substances and germs from entering the embryo |
| What surrounds the embryo | A sac called the amnion |
| What Is the function of the amniotoc fluid | To protect the baby,sterilized and lubricate the birth canal and helps keep the body warm |
| Indentify two materials that pass from mother to foetus and two that pass from foetus to mother | Oxygen,food,carbon dioxide and wastes |
| Name two structures that make up the afterbirth | Placenta and umbilical cord |
| Explain how identical and fraternal twins are form | Fraternal twins arise if two eggs are shed from the ovaries at the same time and both fertilized.identical twins arise when a single egg is shed from one of the ovaries and fertilized in the usual way then spilts into two cells,each of which develops into |
| How old is a boy when he starts to make sperm | 11 or16 years old |
| What is the harmone that causes boys to grow chest hair | Testosterone |
| At what age does a girl start to see her period | 10 or15 years old |
| What is the name of the harmone that causes girls breast to develop | Estrogen |
| Where is ova and sperm made | Ova is made in the ovary and sperm is made in the testes |
| What is fertilization | Fertilization is the joining of a male sex cell,a sperm,with a female sex cell,an ovum,to form a new cell |
| What is the next term for a fertilized egg | Zygote |
| What cause a penis to become erect | When blood has filled the spaces in erectile tissue |
| What is pregnancy | The development of the fertilized egg into a new baby |
| What is implantation | The sinking of the fertilized egg into the lining of the of the womb |
| When does pregnancy begins | When the ball of cells implants itself |
| How long does it take for a fertilized egg to be implanted | One or more hours |
| What is the menstrual | The time between one period and the next is the menstual cycle |
| How long does each menstrual cycle usually take | 28 days |
| What happens during a menstrual period | The lining of the uterus breaks apart.as menstruation begins an egg starts to mature in the ovary |
| What happens 14 days after the start of the period | A mature egg is released from the ovary |
| What is the release of a mature ovum called | |
| What harmonies does the ovary produce | Estrogen and progesterone |
| What is the difference between the embryo and the fetuos | The embryo is an unborn offspring in the process of development and the fetus is the start of an developing of pregnancy till delivery |
Created by:
Leann007
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