Uterine Tubes/ Uterus

Right after menstruation, endometrium is ________ thick and just before menstruation, endometrium is __________ thick

0.5mm and 5mm

What are the 3 layers of the uterus?

1. Endometrium 2. Myometrium 3. Perimetrium

What are the 2 functions of the uterine tubes?

1. Extensions of uterus communicate loosely with ovaries; transport channel for ova 2. Site of fertilization; blocking either end of both tubes causes infertility

What are the 3 divisions of the uterine tubes?

1. Isthmus 2. Ampulla 3. Infundibulum

What are the 3 layers of the uterine tubes?

1. Mucous membrane lining 2. Smooth muscle layer 3. Serosa layer (connective tissue)

What are the 4 functions of the uterus?

1. Part of female reproductive tract; site of conception 2. Site of implantation; source of nutrition for implanted embryo; secretions from endometrial glands (uterine milk) provide nutrition until placenta develops 3. Myometrial contractions expel fetus at end of gestation 4. Menstruation - shedding of endometrium

What are the 3 sub layers of the endometrium?

1. Stratum Compactum 2. Stratum Spongiosum 3. Stratum Basale

How many layers does the myometrium have?

3 layers

What is the blood supply to the uterus?

A lot of blood supply from the uterine arteries. Uterine arteries are branches of internal iliac arteries. Blood vessels from ovarian and vaginal arteries anastomose with uterine arteries. Uterine, ovarian, and vaginal veins return blood to internal iliac vein. Need a lot of blood supply so we can provide nutrients and carry away waste products in order to develop a healthy baby.

Why is menstruation important?

A new lining is better when supporting an embryo

The position of the uterus changes with what?

Age, pregnancy, and distention (swollen) of the pelvis viscera

What are the uterine tubes?

Also called fallopian tubes, they carry an ova from the ovary to the uterus

What portion of the uterine tube is dilated and intermediate?

Ampulla

What part of the uterus is the wider portion?

Body

What are the 3 parts of the uterus?

Body, Cervix, Fundus

What part of the uterus is the lower portion and is narrow?

Cervix

What is the histology of the uterine tube?

Cilia is present on epithelial cells that are lining the tube

What is the most innermost layer of the uterus?

Endometrium

Where is the external os located?

Exiting the cervix

What are the fingerlike projections at the end of the fallopian tubes?

Fimbriae

What part of the uterus is bulging near the fallopian tubes?

Fundus

What do the glands of the functional zone produce?

Glands produce nutrients

What portion of the uterine tube is funnel shaped and opens directly into the peritoneal cavity?

Infundibulum

What are the two cavities of the uterus?

Internal os and External os

What part of the uterine tube is connected to the uterus?

Isthmus

What are the 3 sub-layers of the myometrium?

Longitudinal, Transverse, Oblique

The uterus decreases size and moves deeper into pelvis when what occurs?

Menopause

Around ovulation, what facilitates the movement of sperm through the cervix and into the uterus?

Mucus

Which layer of the uterus is the thickest?

Myometrium

Where is the internal os located?

Opens into cervical canal and entering the cervix

What is the outermost layer of the uterus?

Perimetrium

The functional zone is composed of what?

Rich supply of capillaries and numerous exocrine uterine glands

What kind of muscle is myometrium?

Smooth muscle

What kind of arteries supply the functional zone?

Spiral arteries

What layer of the endometrium border the myometrium and is dense

Stratum Basale

What layer of the endometrium is NOT shed during menstruation?

Stratum Basale

What layers does the functional zone consists of?

Stratum Compact and Stratum Spongiosum

What layer of the endometrium is closest to the lumen and is composed of partially ciliated columnar epithelium?

Stratum Compactum

What layers of the endometrium are shed during menstruation?

Stratum Compactum and Stratum Spongiosum

What layer of the endometrium is the middle layer and is spongy loose connective tissue?

Stratum Spongiosum

Why is the abdominal cavity open to the outside world?

The fallopian tubes do NOT attach to the ovaries

Why does the uterus have 3 layers of myometrium?

The uterus can contract in all directions and they make the uterus very strong

What is the most common site of fertilization?

Uterine Tubes

How long around uterine tubes?

about 10cm long

There is no ________________________ ___________ in male from exterior to peritoneum

equivalent route

What is the uterus?

hollow muscular organ