Human Reproduction

Question 1

There are two testes situated in a sac called the __________

Answer 1

Scrotum

Question 2

The testes contain lots of narrow tubules where __________ are produced in large numbers

Answer 2

Sperm

Question 3

Where is testosterone produced

Answer 3

In the testes

Question 4

What is the male sex hormone

Answer 4

Testosterone

Question 5

Why does the scrotal sac hold the testes outside of the body

Answer 5

Because it is cooler - better for sperm production

Question 6

The sperm duct carries sperm from the testis to the _________

Answer 6

Urethra

Question 7

The ________ ______ carries sperm from the testis to the urethra

Answer 7

Sperm duct

Question 8

The urethra carries urine from the ___________ as well as _______

Answer 8

Bladder

Semen

Question 9

The __________ is located inside the penis, which also contains erectile tissue. During sexual intercourse, this spongy tissue fills with _________ and the penis become erect

Answer 9

Urethra

Blood

Question 10

How many ovaries are there

Answer 10

2

Question 11

Ovaries produce eggs or _____ as well as female sex hormones (____________ and progesterone) that regulate the __________ cycle

Answer 11

Ova
Oestrogen
Menstrual

Question 12

One egg is released about every 28 days from ____________ ovaries

Answer 12

Alternate

Question 13

Two fallopian tubes (more commonly known as __________) transport the ovum from the ________ to the womb (also called the ___________)

Answer 13

Oviducts
Ovary
Uterus

Question 14

Oviducts have delicate fronds that waft the ______ along

Answer 14

Ovum

Question 15

Where does fertilisation of an egg occur

Answer 15

In the oviducts

Question 16

The _________ is a strong muscular organ where an embryo develops

Answer 16

Uterus

Question 17

After an egg is released from the __________, a blood-filled lining develops on the walls of the _________ in preparation for the nourishment of the unborn baby. If no fertilisation of the egg occurs, then this lining passes out through the vagina over several days as a ___________

Answer 17

Ovary
Uterus
Period

Question 18

The neck of the uterus is called the _________, and is a muscular opening between the uterus and the __________

Answer 18

Cervix

Vagina

Question 19

During pregnancy a mucus plug forms across the ________ separating the uterus from the outside to prevent ___________ of the unborn baby

Answer 19

Cervix

Infection

Question 20

The vagina is an elastic and muscular ________ that stretches during birth to allow for the passage of the _______

Answer 20

Organ

Baby

Question 21

A baby girl is born with around half a million eggs already in her undeveloped __________. However only around _____ are released in her lifetime

Answer 21

Ovaries

400

Question 22

When an egg cell is released from an ovary, it is carried into the oviducts by the beating action of the _______ on the inner surface of the tube and the contraction of muscles in the oviducts

Answer 22

Cilia

Question 23

If fertilisation occurs, then it takes place in the ________ part of the fallopian tube (oviduct)

Answer 23

Upper

Question 24

Sperm are made in the _________ and stored in the _____________

Answer 24

Testis

Epididymis

Question 25

Sperm have a tail or ____________

Answer 25

Flagellum

Question 26

The middle part of a sperm is packed with __________________ which carry out ___________ respiration to provide the __________ required for swimming

Answer 26

Mitochondria Aerobic Energy

Question 27

The __________ gland and seminal vesicles produce fluid that provides sperm with nutrients and protection. When mixed with sperm, this fluid is called _________

Answer 27

Prostate | Semen

Question 28

When sperm are released into the female, _____________ fertilisation takes place. When sperm is released into the environment (e.g. fish release sperm into water), ____________ fertilisastion takes place

Answer 28

Internal | External

Question 29

Give 2 functions of the ovary

Answer 29

Contain/store eggs | Hormones are made

Question 30

Sexual reproduction involves ____ parents. Sex cells or __________ are produced

Answer 30

Two | Gametes

Question 31

Gametes join together at fertilisation to form a ________ or fertilised egg

Answer 31

Zygote

Question 32

In humans the zygote divides to form an _____________

Answer 32

Embryo

Question 33

The embryo implants into the _________ lining and grows into a _________

Answer 33

Uterus | Foetus

Question 34

A ___________ forms between the uterus and foetus

Answer 34

Placenta

Question 35

The ____________ controls the passage of substances between the mother and foetus

Answer 35

Placenta

Question 36

What is menstruation

Answer 36

The loss of blood and cells from the uterus lining

Question 37

What is ovulation

Answer 37

The release of a new egg from the ovary

Question 38

Sex cells involved in human reproduction are known as _____________

Answer 38

Gametes

Question 39

The cell division used to make sex cells is called ___________ and in males this takes place in the __________

Answer 39

Meiosis | Testes

Question 40

Why does the number and size of human male gametes differ from the number and size of human female gametes

Answer 40

To increase the chances of fertilisation | Eggs being big makes them an easy target - sperm being small means they can swim properly