Reproductive System Flashcards
What are female sex cells?
Oocytes (eggs)
What are male sex cells?
Sperm
What are a males primary sex organs?
Two testes
Where are the testes housed?
The scrotum
How do sperm cells form?
A process called spermatogenesis
What is spermatogenesis?
How sperm cells form
What are spermatogenic cells in a male called?
Spermatogenia
What are the male accessory organs?
Two epididymides, two ductus deferential, ejaculatory ducts, a urethra, as well as the two seminal vesicles, and the prostrate gland.
Describe epididymides
Tightly coiled, threadlike tubes about 6 meters long (18 feet)
How long are epididymides?
6 meters (18 feet)
What are the epididymides connected to?
Ducts within the testes
When do sperm cells Swim?
After ejaculation
What are seminal vesicles?
Saclike structures that attach to the ductus deferens and secrete a slightly alpine fluid that contains fructose that provides energy for the sperm.
What are saclike structures that attach to the ductus deferens and secrete a slightly alkaline fluid that contains fructose that provides energy for the sperm?
Seminal vesicles
What happens during sexual stimulation?
Nerve impulses from the spinal cord release NO which dilates the arteries leading to the penis.
What reduces blood flow away from the penis?
Increased pressure on the arteries compresses the veins of the penis.
What produces and erection?
Blood accumulates in erectile tissue and the penis swells producing an erection.
What fluid is released first during ejaculation?
Prostate fluid
What is the order in which fluid is released?
Prostate fluid, sperm cells, fluid from seminal vesicles.
What secretes hormones that control male reproductive functions?
The hypothalamus, anterior pituitary gland, and testes
What are male sex hormones called?
Androgens
What is the most important androgens?
Testosterone
What is the main cause of male infertility?
The testes not descending into the scrotum
What does the the testes not descending into the scrotum cause?
Higher temperatures of the body kills the sperm
What are a females primary sex organs?
The two ovaries
What do ovaries produce?
Female sex cells and sex hormones
How many oocytes are produced in the embryo before birth?
Several million
What is produced in the embryo before birth?
Oocytes
What do oocytes begin as?
Primordial follicles
What are primordial follicles?
What oocytes begin as
What is the process of egg cell formation?
Oogenesis
What is oogenesis?
The process of egg cell formation
At puberty what do some of the primordial follicles mature to form?
Primary follicles
Which oocyte can get fertilized?
The large one
What is the small oocyte?
A smaller polar body
How many primary follicles can begin maturing?
20
What is ovulation?
The process of the follicles maturing and giving rise to the secondary oocyte and first polar body during oogenesis.
What happens to the oocyte if it isn’t fertilized within 24 hours?
It degenerates
Where does fertilization occur?
In the uterine tube
What keeps the embryo for development?
The uterus
What is the lower third part of the uterus called?
Cervix
What is the cervix?
The lower third of the uterus
What extends down into the upper part of the vagina?
The cervix
What are the external sex organs of a girl collectively called?
The Vulva
What does the vulva include?
Labia Majorca, labia minors, clitoris, and vestibule
What does the clitoris correspond to in a male?
The penis
What stimulates enlargements of accessory organs in girls?
Estrogen
Who has irregular reproductive cycles?
Elite female athletes
What is the problem in elite female athletes?
Too little body fat
What may happen when elite female athletes reproductive cycles (periods) stop?
They may impair their ability to conceive (have kids)
What does too little body fat in women do?
Decreases secretion of estrogen levels
What is the most effective birth control?
Oral contraceptives (pills)
What do the birth control oral contraceptives (pills) contain?
Synthetic estrogen and progesterone
What do women need to get periodically tested for?
Cervical cancer
What is used to detect abnormal cells in the cervix?
A Pap smear
What does hormone replacement therapy do?
Replaces estrogen in the body
Who can take hormone replacement therapy?
Women going through menopause
What are the primary sex organs of the male?
Testes
What is the process in which sex cells are formed?
Meiosis
What is meiosis?
The process in which sex cells are formed
How many chromosomes does each spermatogonium contain?
46
What happens during the chromosome number in meiosis?
It’s reduced
How many chromosomes does the head of the sperm contain?
23
What is the function of the epididymis?
Store sperm as they mature
What is added to sperm cells by the seminal vesicle?
Fructose
What are the male external reproductive organs?
The penis and scrotum
What is not a male internal accessory organ?
The testes
Exposure to the cold causes the scrotum to what?
Contract
Name the 3 male reproductive hormones that are secreted from the testes
The hypothalamus and the anterior pituitary gland
What stimulates the growth of male body hair?
Testosterone
Where does an oocyte mature during puberty?
The primary follicle
What is ovulation?
When the egg is released from the ovary
What is the inner layer of the uterus called?
Endometrium
What is the endometrium?
The inner layer of the uterus
What does the vagina connect the uterus to?
The outer surface of the body
What female part corresponds to the penis?
The clitoris
Hormonal mechanisms are (more or less) complex than the male?
More complex
What hormones are primary in girls?
Estrogen and progesterone
What hormone is primary in a guy?
Testosterone
What is menopause?
The cessation of the menstrual cycle in middle age women.
What causes infertility in elite female athletes?
Too little estrogen
What are the 4 stages of the period?
Menstruation
Proliferative phase
Secretory phase
Menstruation
How many women develop bread cancer in their life?
1/8
How much % of breast cancer do men have?
1%
What is a sign of breast cancer?
A dimple, change in color, a flattened Nipple, discharge.
What is a mammogram?
An X-ray scan to find abnormal tissue in the breasts
80% of the time a breast lump is a sign of what?
Fibrocystic breast disease
Is fibrocystic breast disease cancerous or benign?
Benign (noncancerous)
What is a fibroadenoma?
A breast cyst or mass of connective tissue
What do they do for a cancerous cyst in the breast?
Surgery to remove it
What are most breast cancers treated with?
Radiation and chemotherapeutic drugs
What % of breast cancer comes from inheritance?
5-10%
What triggers the majority of breast cancer?
Environment