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
