Chapter 21 - Reproduction in Humans

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Mature eggs

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27 Terms

1

Mature eggs

________ are released from the ovaries into the oviducts.

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2

tail

The structure in a sperm cell which beats to propel the sperm towards the egg.

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3

male sex

The fluids from the ________ glands that make up semen provide nutrients and protection for the sperms, as well as a medium for them to swim in.

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4

Progesterone

maintains the endometrium by causing it to become thicker.

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5

smooth muscles

The ________ in the uterine wall contract to expel the fetus during birth.

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6

placenta

provides nutrients (glucose, amino acids and mineral salts) and oxygen for the embryo.

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7

Cilia

Lined in the inner lining help move the ovum to the uterus.

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8

sexual intercourse

The process during which semen containing sperms is deposited into the vagina of a woman.

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9

sperm

The male gamete, which consists of a head, middle piece and tail.

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10

Semen

a composition of sperm and fluids from the sex glands containing nutrients and enzymes which nourish and activate the sperm, allowing them to swim actively.

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11

birth canal

It forms the ________ through which the baby is born.

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12

Immune Deficiency Syndrome

Acquired ________ (AIDS) is a disease that can be spread through sexual intercourse.

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13

scrotum

The pouch like bag which holds the two testes out of the body.

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14

Spread of HIV

________ can be prevented by: (a) Having protected sexual intercourse.

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15

ovum

The female gamete, which is a large cell containing abundant cytoplasm.

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16

endometrium

The ________ breaks down and flows out of the body.

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17

28

The menstrual cycle normal span time (days)

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18

endometrium

The tissue in females richly supplied with blood vessels and is the site of implantation of the embryo post-fertilisation.

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19

Human Immunodeficiency Virus

It is caused by a virus called ________ (HIV)

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20

uterus

a thick muscular organ in females that can stretch as the fetus increases in size during pregnancy.

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21

large nucleus

It has a(n) ________ containing a haploid set of chromosomes.

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22

seminal vesicles

a pair of glands in males that secrete a fluid that makes up a proportion of semen.

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23

Prostrate gland

a large gland in males which secretes directly into the urethra through several small ducts.

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24

Oviduct

a narrow muscular tube leading from the ovary to the uterus.

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25

Zygote

Fertilized ovum

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26

Embryo

Hollow ball of cells

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27

AIDS

The disease which shows the symptoms: Persistent fever, sweat, swollen glands, chills, weakness and weight loss

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