Vocabulary for Spermatogenesis
Spermatogonia
Exists in the seminiferous tubules inside the
(singular:
testis
spermatagonium)
Undergoes both mitosis and meoisis
Mitosis to replishness their numbers and become
a Primary Spermatocyte
Meiosis I to produce two haploed secondary
spermatocytes
Meiosis II four haploid spermatozoa (singular:
spermatozoon) also called spermatid
spermatozoa
(singular:
spermatozoon)
spermatid
A very small cell, containing a haploid number of
chromosomes. Immature Sperm, also called
spermatid.
They are created from Secondary Spermatocytes
via Meiosis II
Serotoli Cells
Large cells inside the seminiferous tubules inside
the testis. These cells provide nutrients to sperm
Sperm
Mature sperm. Leave seminiferous tubules inside
the testis move into the epididymis for more
development.
Leydig Cells
Cells inbetween the seminiferous tubules of the
testis that produce testosterone.
Primary
Spermatocyte
Diploid cell produced via mitosis of the
Spermatogonia
(singular: spermatagonium)
Secondary
spermatocytes
Haploid cell produced via meiosis I of the primary
spermatocyte
Process of spermatogenesis
Vocabulary for Oogenesis
Germinal Epithelium
Outer cell layer of the ovary
Oogonium (Plural:
oogonia)
These diploid cells are produced via mitosis of the
germinal epithelium cells of ovarys divide
Primary Oocytes
Matured Oogonium that become surrounded by layers
of follicle cells
Primary Follicle
The primary oocytes + follicle cells
Secondary Oocytes
These haploid cells are formed from meoisis I of the
primary oocytes. This is the cell released during
ovulation. Meiosis II will only occur if fertilzation
occurs.
Spermatogenesis vs. Oogenesis
Spermatogenesis
Hormones involved
Cell growth/ enlargement
before meiosis (yes/no)
Location/ where in the
human body does it
occur?
At what point in human
development does it
start?
How long does it
continue through a
humans lifetime?
How often does it occur?
How many sperm and
eggs cells are produced at
one time?
During meiosis are there
equal divisions of
cytoplasm?
Polar Bodies (yes/ no)
Sertoli (nurse) Cells (yes/
no)
Meoisis II completed
before fertilization
(yes/no)
Oogenesis
1. Label the structures above.
2. Using a ruler calculate the Magnification of the egg cell. Show your work below.
3. Fill in the table regarding the name and the function of each of the structures for the sperm and egg cell.
Name of structure
Function of Structure
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.