birth canal


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Related to birth canal: placenta

canal

 [kah-nal´]
a relatively narrow tubular passage or channel.
adductor canal Hunter's canal.
Alcock's canal a tunnel formed by a splitting of the obturator fascia, which encloses the pudendal vessels and nerve.
alimentary canal see alimentary canal.
anal canal the terminal portion of the alimentary canal, from the rectum to the anus.
atrioventricular canal the common canal connecting the primordial atrium and ventricle; it sometimes persists as a congenital anomaly.
birth canal the canal through which the fetus passes in birth.
carotid canal one in the pars petrosa of the temporal bone, transmitting the internal carotid artery to the cranial cavity.
cervical canal the part of the uterine cavity lying within the cervix.
condylar canal an occasional opening in the condylar fossa for transmission of the transverse sinus; called also posterior condyloid foramen.
canal of Corti a space between the outer and inner rods of Corti.
femoral canal the cone-shaped medial part of the femoral sheath lateral to the base of Gimbernat's ligament.
haversian canal any of the anastomosing channels of the haversian system in compact bone, containing blood and lymph vessels, and nerves.
Hunter's canal a fascial tunnel in the middle third of the medial part of the thigh, containing the femoral vessels and saphenous nerve. Called also adductor canal.
hypoglossal canal an opening in the occipital bone, transmitting the hypoglossal nerve and a branch of the posterior meningeal artery; called also anterior condyloid foramen.
infraorbital canal a small canal running obliquely through the floor of the orbit, transmitting the infraorbital vessels and nerve.
inguinal canal the oblique passage in the lower anterior abdominal wall on either side, through which passes the round ligament of the uterus in the female, and the spermatic cord in the male.
medullary canal
optic canal a passage for the optic nerve and ophthalmic artery at the apex of the orbit; called also optic foramen.
pulp canal root canal.
root canal that part of the pulp cavity extending from the pulp chamber to the apical foramen. Called also pulp canal.
sacral canal the continuation of the spinal canal through the sacrum.
Schlemm's canal venous sinus of sclera.
semicircular c's see semicircular canals.
spinal canal (vertebral canal) the canal formed by the series of vertebral foramina together, enclosing the spinal cord and meninges.
Volkmann's c's canals communicating with the haversian canals, for passage of blood vessels through bone.

birth ca·nal

cavity of the uterus and vagina through which the fetus passes.
Synonym(s): parturient canal

birth canal

n.
The passageway through which the fetus is expelled during parturition, leading from the uterus through the cervix and the vagina.

birth canal

Anatomy
A popular term for the passage through which the foetus traverses the travails of parturition; to wit, the uterus, the vagina, and the vulva.
 
Vox populi
Vagina, see there.

birth canal

Parturient canal A popular term for the passage through which the fetus travels the travails of parturition, to wit, the uterus, the vagina, and the vulva

birth ca·nal

(bĭrth kă-nal')
Cavity of the uterus and vagina through which the fetus passes.
Synonym(s): parturient canal.

birth canal

The exit route through which the baby is forced by the contraction of the womb. The canal consists of the widely stretched cervix of the uterus, the vagina, and the small and large external lips-the labia.
References in periodicals archive ?
The most frequent problems that occur are a calf positioned incorrectly in the birth canal, or a calf that's too large to pass easily through the cow's pelvis no matter what position it's in.
It's healthier for both the cow and calf if you can assist the cow before she is fatigued and the calf compromised by being in the birth canal too long.
"In this study, Caesarean section-delivered infants who are not entering the birth canal of the mother either lacked or displayed a delayed colonisation of one of the major gut phylum, the Bacteroidetes.
"Historically, Rotorua women used ngawha or heat over the birth canal during labour.
The scare is thought to have been caused by a pre-existing condition called placenta previa - a low lying placenta that blocks the birth canal and can lead to severe bleeding.
Babies in a breech position (their legs are nearest to the birth canal) are usually delivered by Caesarean.
Previous studies suggest that, in term or preterm labor, white blood cells influx into the cervix and release enzymes that break down tissue support and remodel the cervix, allowing a baby to pass through the birth canal. That is only half right, researchers in this investigation report.
or, if you try for "labor speedup," shooing a recalcitrant baby toward the birth canal. But in 1952, when Lucille Ball filmed Episode 39 of I Love Lucy, the concept was familiar enough to work as comedy material.
Previous studies had suggested that in term and preterm labor, white blood cells flow into the cervix and release enzymes that break down tissue support and remodel the cervix, allowing a baby to pass through the birth canal. That is only half-right, researchers reported.
During delivery, Johnny's shoulders become obstructed within the birth canal, a condition known as shoulder dystocia, a potentially fatal emergency condition that, more often than not, deprives babies of oxygen.
Instead he recorded that Megan died before birth as a result of a common condition called velamentous insertion of the umbilical cord which caused key veins to be squashed in the narrow birth canal, depriving the brain of blood and oxygen.
Women will wear a small ring that releases antiretroviral drugs in to the birth canal, blocking HIV transmission for one month.