Question

4.Summarize how babies are made. List all the things that need to occur for a baby to be born (Remember this is a 40-week process).

5.Define lactation and summarize how it is regulated

Answer 1

4.Reproduction in human beings begins sexual intercourse.After copulation, if fertilization has occurred, then pregnancy follows.The pregnancy takes nine months then birth occurs.

Copulation

Naturally, human reproduction occurs through sexual intercourse.This type of reproduction is internal fertilization.

Fertilization

Upon ejaculation, the sperms carried by the semen travel all the way through female reproductive system.Upon fertilization, the egg divides itself it various cell through mitosis.This leads to a nine-month period called pregnancy.

Pregnancy

Now the male and female gamete have joined together to form a zygote.The cells continue to multiply through mitosis.The period from fertilization to birth is called pregnancy period.During this time, the zygote or fetus receives nutrients and oxygenated blood through the placenta.The placenta is a connector between the mother and the baby.It is also used as a medium of substance exchange between the two.The bay undergoes various stages.The zygote stage lasts for three daysEmbryo stage lasts for two months and the last stage, the fetus goes up to the day of delivery.

Childbirth

The fetus grows in the mother’s womb naturally.After it has fully developed, it is born.The process of birth begins with labor pain.The amniotic sack bursts and expellees the amniotic fluid.The labor causes the uterine walls to thrust the baby out through the birth canal.The head emerges first in typical cases.The hands and the whole baby comes outside.

5. The process of milk production is called lactation. Human milk is secreted by the mammary glands, which are located within the fatty tissue of the breast. The hormone oxytocin is produced in response to the birth of a new baby, and it both stimulates uterine contractions and begins the lactation process. For the first few hours of nursing, a special fluid called colostrum is delivered; colostrum is especially high in nutrients, fats, and antibodies, to protect the newborn from infection. Thereafter, the amount of milk produced is controlled primarily by the hormone prolactin, which is produced in response to the length of time the infant nurses at the breast.