Unit 3. REPRODUCTION
- 2. DO YOU KNOW WHERE BABIES REALLY COME FROM? DO STORKS BRING BABIES IN THEIR BEAKS?
- 3. HUMAN BEINGS are living things THEY PERFORM THREE VITAL FUNCTIONS INTERACTION REPRODUCTIONNUTRITION 5 senses Nervous System Locomotor system Digestive System Respiratory System Circulatory System Excretory System SEXUAL 2 organisms: male and female ASEXUAL 1 organism is required
- 4. Reproduction It is the third vital function The process by which living things generate or produce new living things (offspring) so they cannot become extinct. Human being performs a sexual reproduction
- 5. REPRODUCTION • What kind of reproduction do human beings perform? • What is the meaning of sperm? • How do you call the female reproductive cell? • What happen when sperm and ovum meet? • How does the zygote progress/change to? • How do you call the stage between childhood and adulthood? • What happen in the adolescence?
- 6. SPERM OVUM
- 8. PREBIRTH LIFE STAGES baby toddler child adult adolescent Elderly person Foetus
- 9. SEXUAL CHARACTERISTICS: physical diferences between women and men
- 12. OVARIES Produce female reproductive cells called OVA. One Ovum matures each month. FALLOPIAN TUBES They connect the ovaries to the uterus. UTERUS It is an organ with muscular walls. During pregnany a fertilised cell develops into a baby in the uterus. VAGINA It is a muscular tube which connects the uterus to the outside of the body. VULVA It covers the opening to the vagina. It’s outside of the body. FEMALE REPRODUCTIVE ORGANS
- 13. MENSTRUAL CYCLE? MENSTRUATION? HAVE THE PERIOD?
- 14. A menstrual cycle is a process that takes for girls and teens around 28 days. THE MENSTRUAL CYCLE If a sperm cell does not fertilize the ovum, the unfertilized egg will die and the wall from the uterus leave the body. In other words, a girl has her period and the cycle begins again. Menstruation The blood, tissue from the uterus and not fertilize ovum leave the body because it's no longer needed. It comes from the uterus. And the girl or woman has her period. After that, the brain stimulates the ovum in the ovaries to grow and the wall of the uterus will start building up in case the woman becomes pregnant Ovulation About 2 weeks after the last period, another OVUM will be released from one of the ovaries and begins a trip down one of the fallopian tubes to the uterus.
- 16. PUBERTY IN GIRLS AND BOYS
- 17. MALE REPRODUCTIVE ORGANS Most male reporductive organs are external and are located on the outside of the body TESTICLE VAS DEFERENS SEMINAL VESICLE PROSTATE URETHRA PENIS SCROTUM
- 18. HOW LONG DOES PREGNANCY LAST? It is the period of time from conception to childbirth (9 months). The state of being pregnant. It is the act of giving birth. The appearance of a baby from the body of its mother. PREGNANCY (noum) GIVE BIRTH TO... (verb) CHILDBIRTH (noum)
- 20. 1ST STAGE: FERTILISATION The egg (ovum) is released into the falopian tube (ovulation). During the sexual act the sperm are deposited in the woman’s vagina. They use their tails to reach the OVUM and ONLY ONE SPERM can fertilise it (the ovum). FERTILISATION That union produces a cell called ZYGOTE and starts to divide and multiply.
- 21. 2nd STAGE: DEVELOPMENT OF THE EMBRYO After fertilisation, the zygote travels to the uterus at the same time it carries on dividing until it becomes an EMBRYO. The embryo attaches itself onto the lining (wall) of the uterus where it continues to grow. After the 2nd month the embryo is about the size of an adult’s THUMB
- 22. 1ST AND 2ND STAGE 2ND MONTH OF PREGNANCY: embryo
- 23. 3. The FOETUS receives oxygen, food (nutrients) from the mother’s placenta and it transfers waste and CO2 to the mother via placenta. 3RD STAGE: DEVELOPMENT OF THE FOETUS 1. After the 2th month, all the organs are formed and the embryo develops into a FOETUS 2. The FOETUS is floating in a sac of amniotic fluid which protect it from impacts 4. The FOETUS is connected to the placenta by the umbilical cord
- 25. The placenta is an organ that connects the developing foetus to the uterine wall. The placenta provides oxygen and nutrients to growing babies and removes waste products from the baby's blood. The placenta attaches to the wall of the uterus, and the baby's umbilical cord develops from the placenta. The umbilical cord is what connects the mother and the baby.
- 26. 4th STAGE: BIRTH PREGNANCY LASTS ABOUT 280 DAYS (9 MONTHS) DURING PREGNANCY JUST BEFORE THE CHILDBIRTH •When the foetus is ready to be born, it pushes against the cervix, which starts to open and widen. •Babies are usually born head first. •The umbilical cord comes out with the baby and this is cut and tied and forms our navel or belly button. Uterus Cervix