Reproduction in Humans Flashcards

Flashcards on Reproduction in Humans lecture notes.

__ is the fusion of gamete nuclei.

Fusion of gamete nuclei.

The __ produce the female gametes (ova or egg cells) once every 28 days alternatively.

Ovaries.

Fertilization takes place in the first third of the __.

Fallopian tube

Very slowly, the egg travels towards the uterus by aid of __ lining the oviduct.

Cilia

__ is the site of implantation and development of the embryo.

Uterus

During birth the __ dilates to allow passage of the baby.

Cervix

The __ receives sperms during sexual intercourse and acts as a birth canal during giving birth.

Vagina

Sperms are produced in the __.

Testes

The __ protects and holds testes outside the body to maintain a lower optimum temperature for sperm production.

Scrotum

The __ carries sperm from testis to the urethra.

Vas deferens

The __ adds seminal fluid which makes 99.5 % of the semen.

Seminal vesicle

An __ is larger than a sperm.

Egg cell

__ contain enzymes to allow the sperm cell to break through the cell wall of the egg cell.

Acrosome

__ help the sperm to move toward the ovum.

Flagellum

In boys, puberty changes are controlled by sex hormone __.

Testosterone

In girls, puberty changes are controlled by sex hormone __.

Oestrogen

Signals are processed by the brain (__) stimulating primary sex organs to produce sex hormones.

Pituitary gland

The menstrual cycle is the cycle of producing and releasing mature ova every __ days from the 2 ovaries alternatively.

28

The anterior Lobe of the pituitary gland secretes __.

FSH

The mature follicle secretes __.

Estrogen

A surge in __ causes ovulation to take place around day 14 of the cycle.

LH

__ maintains and supports the uterus lining.

Progesterone

It takes the ovum __days to reach the uterus during which fertilization can take place.

4-7 days

It is the joining of the haploid nuclei of male gamete and the haploid nuclei of female gamete to form a diploid __.

Zygote

The placenta is joined to the embryo by the __.

Umbilical cord

The __ surrounds the fetus while it is growing inside the uterus.

Amniotic sac

AIDS is caused by __.

HIV

What is the function of the ovaries in the female reproductive system?

Ovaries produce female gametes (ova or egg cells) once every 28 days alternatively.

What is the role of the fallopian tube in reproduction?

Fertilization takes place in the first third of the fallopian tube.

How do cilia assist the egg after fertilization?

Cilia help slowly move the egg toward the uterus.

What happens in the uterus during pregnancy?

The uterus is the site of implantation and development of the embryo.

What is the role of the cervix during childbirth?

The cervix dilates to allow the passage of the baby.

What is the purpose of the scrotum in the male reproductive system?

The scrotum protects and holds testes outside the body to maintain a lower optimum temperature for sperm production.

What are the components of semen and what do they come from?

Seminal fluid makes 99.5% of the semen and is added by the seminal vesicle.

What is the significance of testosterone in puberty?

Testosterone controls puberty changes in boys.

What hormone is responsible for changes during puberty in girls?

Oestrogen controls puberty changes in girls.

What does the pituitary gland stimulate concerning sexual health?

The pituitary gland processes signals and stimulates primary sex organs to produce sex hormones.

What triggers ovulation in the menstrual cycle?

A surge in LH causes ovulation to take place around day 14 of the cycle.

What is the process of zygote formation?

The joining of haploid nuclei of male and female gametes forms a diploid zygote.

What protects the developing fetus in the uterus?

The amniotic sac surrounds the fetus while it is growing inside the uterus