The document summarizes key aspects of the human reproductive system. It describes the uterus as the organ that houses the developing fetus. The uterus has three layers - the perimetrium, myometrium, and endometrium. The endometrium is the inner uterine lining where the embryo implants and develops until birth. Gestation, the period of fetal development, is around 40 weeks in humans. The summary highlights the major stages of fetal growth and development over the course of the gestation period.

1. PRESENTATION 10
THE REPRODUCTIVE
SYSTEM
By Sam Choi

2. The organ in which the developing
fetus resides is the uterus
 Uterus (“womb” in latin) is located in the pelvis
and it’s anterior to the rectum and
posterosuperior to the bladder.

3. The uterus
 It is a hollow muscular organ that houses a fertilized
ovum. The main part of the uterus is called body, then
there is the cervix, which is a narrow area at the bottom
part of the uterus and two isthmus lead into the fallopian
tubes.

4. The uterus
 It is made up of three layers called
perimetrium, myometrium and endometrium.
 Perimetrium is mainly peritoneum,
Myometrium is composed of smooth muscle
and endometrium is highly vascularized simple
columnar epithelium.

5. The inner lining of the uterus is
called endometrium
 Endometrium is
highly vascularized
simple columnar
epithelium
 After fertilization, the
embryo implants
into the
endometrium and
stays there until it is
developed.

6. Endometrium
 It has two layers, the  The second layer,
first most superficial stratum basalis,
one is called the forms a new
stratum functionalis functionalis after
and it changes in menstruation is
response to the completed.
hormones levels
and sheds during
menstruation.

7. The time required for the
development of the fetus is called
gestation
 Gestation in humans
is 40 weeks. During
this time, the fetus,
located in the uterus
will grow and develop
until it is ready to
come out.

8. Gestation
 Week 8: ossification  Weeks 13-16: Face
starts, looks human, GI
cardiovascular tract is forming,
system fully most bones are
functional, limbs distinct.
present.  Weeks 17-20: Fetal
 Weeks 9-12: skins position is assumed,
start developing, and mom feels fetal
blood cells form in movement.
the bone marrow,
sex can be
determined form the
genitals.

9. Gestation
 Weeks 21-30:
Substantial increase in
weight, eyes are open,
fingernails and toenails
are present, distal
limbs start to ossify,
testes reach scrotum
in males.
 Weeks 30-40: Skin
becomes whitish pink,
fat appears in the
hypodermis. Labor and
delivery will occur at
the end of this period.

10. Works cited
 Fregmen, Bonnie. Medical Terminology.
Pearson. Upper Saddle River, NJ. 2009.
 Marieb, Elaine. Human anatomy and
physiology 7th ed. Pearson. San Fransisco,
CA. 2007.