Gametogenesis

Front 1

Germinal Epithelium

Back 1

wall of seminiferous tubule with layers of developing sperm

Front 2

Interstitual Cells (Leydig cells)

Back 2

testosterone-producing cells found outside seminiferous tubules

Front 3

Lumen of the seminiferous tubules

Back 3

central cavity of the tubules into which mature sperm are released

Front 4

Primary spermatocytes

Back 4

diploid cells that undergo the first meiotic division to give rise to secondary
spermatocytes

Front 5

Secondary spermatocytes

Back 5

haploid cells that undergo the second meiotic division to give rise to
spermatids, short-lived and seldom seen in slides

Front 6

Seminiferous tubules

Back 6

tightly coiled structures in which the sperm develop

Front 7

Sertoli cells

Back 7

"nurse" cells that nourish developing sperm and anchor spermatids during maturation

Front 8

Spermatids

Back 8

haploid cells that undergo spermiogenesis to become mature sperm

Front 9

Spermatogonia

Back 9

diploid cells that undergo mitotic division to give rise to primary spermatocytes

Front 10

Testes

Back 10

male reproductive organ that is the site of spermatogenesis

Front 11

Tunica albuginea

Back 11

connective tissue layer surrounding the seminiferous tubules

Front 12

Antral follicle

Back 12

developing follicle with an internal cavity (antrum), but which has not yet developed the cumulus oophorus of a Graafian follicle

Front 13

Antrum

Back 13

the fluid-filled space found in antral or Graafian follicles; also called the follicular cavity

Front 14

Corona radiata

Back 14

cumulus cells surrounding the free oocyte after ovulation

Front 15

Corpus luteum

Back 15

an endocrine organ formed from the remaining follicle cells after ovulation occurs,
secretes large amounts of progesterone and small amounts of estrogen

Front 16

Cumulus oophorus

Back 16

small mass of cells separating the oocyte from the antrum in a Graafian follicle

Front 17

Follicle

Back 17

ovarian structure in which oocyte maturation takes place

Front 18

Graafian follicle

Back 18

mature follicle containing a cumulus oophorus; in this structure the primary oocyte
completes the first meiotic division, giving a secondary oocyte and the first polar body, and begins
the second meiotic division (right before ovulation)

Front 19

Ovary

Back 19

female reproductive organ that is the site of oogenesis

Front 20

Primary follicle

Back 20

developing follicle containing a primary oocyte surrounded by a single layer of cuboidal
follicle cells

Front 21

Primary oocyte

Back 21

the form of the developing oocyte from about 3 months of human fetal development
until meiosis resumes shortly before ovulation

Front 22

Primordial follicle

Back 22

non-growing follicle containing a primary oocyte stalled in prophase of the first meiotic division and surrounded by a single layer of flattened follicle cells

Front 23

Secondary follicle

Back 23

developing follicle containing a primary oocyte surrounded by more than one layer of
follicle cells, but no antrum

Front 24

Secondary oocyte

Back 24

developing oocyte not usually seen in slides because it is formed just before ovulation,
in humans it is arrested in metaphase of the second meiotic division

Front 25

Theca externa

Back 25

the muscular outer layer of connective tissue (smooth muscle and collagen) surrounding an Antral or Graafian follicle

Front 26

Theca interna

Back 26

the vascularized and glandular inner layer of connective tissue surrounding an Antral or
Graafian follicle, cells in this layer can produce testosterone.

Front 27

Zona pellucida

Back 27

acellular material secreted between the oocyte and follicle cells.