File Name: cervix anatomy and physiology .zip
Uterus , also called womb , an inverted pear-shaped muscular organ of the female reproductive system , located between the bladder and the rectum. It functions to nourish and house a fertilized egg until the fetus , or offspring, is ready to be delivered. The uterus has four major regions: the fundus is the broad curved upper area in which the fallopian tubes connect to the uterus; the body, the main part of the uterus, starts directly below the level of the fallopian tubes and continues downward until the uterine walls and cavity begin to narrow; the isthmus is the lower, narrow neck region; and the lowest section, the cervix , extends downward from the isthmus until it opens into the vagina.
Martyn, F. McAuliffe, M. Wingfield, The role of the cervix in fertility: is it time for a reappraisal? Knowledge regarding the role of the cervix in fertility has expanded considerably over the past 20 years and in this article, we propose that it is now time for its function to be reappraised. First, we review the anatomy of the cervix and the vaginal ecosystem that it inhabits.
The cervix is the lower portion of the uterus , an organ of the female reproductive tract. Anatomically and histologically, the cervix is distinct from the uterus, and hence we consider it as a separate anatomical structure. In this article, we shall look at the structure of the cervix, its vasculature, innervation, functions, and any clinical relevance. It is lined by stratified squamous non-keratinized epithelium. The opening in the ectocervix, the external os, marks the transition from the ectocervix to the endocervical canal. It is lined by a mucus-secreting simple columnar epithelium.
If you create an account, you can set up a personal learning profile on the site. Now that you have completed this study session, you can assess how well you have achieved its Learning Outcomes by answering these questions. You can check your answers with the Notes on the Self-Assessment Questions at the end of this Module. Choose the correct directional terms from Box 3. The uterus is anterior to in front of and superior to above the rectum. An alternative way of expressing the same positions is to say that the rectum is posterior to behind and inferior to below the uterus.
These parts are internal; the vagina meets the external organs at the vulva, which includes the labia, clitoris, and urethra. The vagina is attached to the uterus through the cervix, while the uterus is attached to the ovaries via the fallopian tubes. At certain intervals, the ovaries release an ovum, which passes through the fallopian tube into the uterus. If, in this transit, it meets with sperm, the sperm penetrates and merges with the egg, fertilizing it. The fertilization usually occurs in the oviducts, but can happen in the uterus itself.
The uterus is a secondary sex organ. Secondary sex organs are components of the reproductive tract that mature during puberty under the influence of sex hormones produced from primary sex organs the ovaries in females and the testes in males. The uterus is a thick-walled muscular organ capable of expansion to accommodate a growing fetus. It is connected distally to the vagina, and laterally to the uterine tubes. The exact anatomical location of the uterus varies with the degree of distension of the bladder. In the normal adult uterus, it can be described as anteverted with respect to the vagina, and anteflexed with respect to the cervix:.
The cervix or cervix uteri Latin, 'neck of the uterus' is the lower part of the uterus in the human female reproductive system. The narrow, central cervical canal runs along its entire length, connecting the uterine cavity and the lumen of the vagina. The opening into the uterus is called the internal os , and the opening into the vagina is called the external os. The lower part of the cervix, known as the vaginal portion of the cervix or ectocervix , bulges into the top of the vagina. The cervix has been documented anatomically since at least the time of Hippocrates , over 2, years ago. The cervical canal is a passage through which sperm must travel to fertilize an egg cell after sexual intercourse.
Ты лжешь, - ответил ему внутренний голос. Да, это. Он - лжец. Он вел себя бесчестно по отношению ко многим людям, и Сьюзан Флетчер - одна из. Он очень о многом ей не сказал - о многих вещах, которых теперь стыдился.
Держитесь. Скоростной карт фирмы Кенсингтон повернул за угол и остановился. Сзади, перпендикулярно туннелю, начинался коридор, едва освещаемый красными лампочками, вмонтированными в пол. - Пойдемте, - позвал Бринкерхофф, помогая Сьюзан вылезти.
Ему нужно было повернуть рубильник, и тогда отключилось бы электропитание, еще остававшееся в шифровалке.
Your email address will not be published. Required fields are marked *