Chapter 5 - Anatomy & Physiology - Module 1 Flashcards
The pelvis is composed of:
The pelvis is composed of: (1) two hip bones called the innominate bones (ox coxae); (2) the sacrum; and (3) the coccyx.
The innominate bones consist of
The innominate bones consist of the pubis, the ischium, and the ilium, all of which fuse at the acetabulum.
Pelvic support
Pelvic support structures include not only the muscles and connective tissue of the pelvic floor, but also the fibromuscular tissue of the vaginal wall and endoplevic connective tissue.
Levator ani muscle
The levator ani muscle is a critical component of pelvic support; is it often considered the most important muscle of the pelvic floor. Normally it is in a constant state of contraction, providing support for all of the abdominopelvic contents against intra-abdominal pressures.
Vulva
The vulva is the externally visible outer genitalia. It includes the:
- mons pubis
- labia minora and majora
- clitoris
- urinary meatus
- vaginal opening
- corpus spongiosum erectile tissue (vestibular bulbs)
Bartholin’s glands
Located on each side of the vestibule, Bartholin’s glands secrete lubricating mucus into the introitus during sexual excitement. Bartholin’s glands are pea sized and are located at about the 4 and 8 o’clock positions in the vulvovaginal area, just beneath the fascia. The opening is between the labia minora and the hymen.
Mons pubis
The mons pubis is the mound-like fatty tissue that covers and protects the symphysis pubis. During puberty, genital hair growth covers this pad of tissue
Labia majora
The labia majora assist in keeping the vaginal introitus closed, which, in turn, helps prevent infection.
Labia minora
The labia minora are surrounded by the labia majora and are smaller, non-fatty folds covered by non-hair-bearing skin laterally and by vaginal mucosa on the medial aspect. The labia minora also assist in enclosing the opening of the urethra and the vagina. Labia minora are usually more prominent in children and postmenopausal women.
Clitoris
The clitoris is a sensitive organ that is typically described as the female homologue of the penis in the male, particularly in its erogenous function.
Skene’s (paraurethral) glands
Two Skene’s (paraurethral) glands open directly into the vulva and are adjacent to the distal urethra. The Skene’s glands, which release mucus, form a triangular area of mucous membrane surrounding the urethral meatus from the clitoral glans to the vaginal upper rim or caruncle.
Skene’s glands release mucus.
Urethra
The urethra is a short conduit, approximately 3 - 5 cm long, extending from the base of the bladder and exiting externally in the periurethral glans area.
Ovaries
Ovaries, located near the lateral walls of the pelvic cavity, produce gametes (ova) and the sex hormones estrogen and progesterone.
Fallopian tubes
Fallopian tubes, oviducts, are paired narrow muscular tubes that extend approximately 10 cm from each cornu of the body of the uterus, outward to their openings near the ovaries. Often the site of fertilization. Transfer the ova from the ovaries to the uterus.
Uterus
The uterus is a muscular, inverted, pear-shaped, hollow, thick -walled organ that opens to the vagina at the cervix and then widens toward the top where the uterine tubes enter. Its anatomic regions include the fundus, body, and cervix.
Vagina
The vagina is a thin-walled tube extending from the external vulva to the cervix.
Cervix
The cervix is the lower portion of the uterus that opens into the vagina. It is made mostly of dense connective tissue. The opening of the cervix into the vagina occurs at almost a right angle to the long axis of the vagina.
Breasts …
Breasts often define women in both the public and private eye.
Breasts, anatomy
Breasts are large, modified sebaceous glands contained within the superficial fascia of the chest wall located over the pectoral muscles. 15 - 20 lobes branch to form 20 - 40 lobules which are subdivided into many secretory alveoli. Alveoli produce milk and other substances during lactation.
Areola
The areola is the pigmented area surrounding the nipple. The areola is populated by numerous oil-producing Montgomery’s glands whose purpose is to protect and lubricate the nipple during lactation.