sexual reproduction Flashcards
does sexual reproduction require gamatees
yes
how are gamatees produced
meiosis
what is meosis
Meiosis is the process where a single cell divides twice to produce four ‘daughter’ cells that contain half the original DNA.
what are the female and male reproductive parts of plants
carpel = female
stamen = male
whats in the carpel
The carpel is composed of the stigma, style, ovary and ovules.
whats in the stamen
The stamen is composed of the anther and the filament.
how does sexual reproduction work
Sexual reproduction in animals involves the fusion of a sperm and egg cell to form a zygote.
wheres is sperm produced
In males, the sperm cells are produced in the testes (singluar: testis), while in females, the eggs are produced in the ovaries (singular: ovary).
what is the external parts of the male reproductive system
The testes, scrotum, epididymis and penis are part of the male external reproductive system.
internal male reproductive system parts
The urethra, vas deferens, seminal vesicles, prostate gland and bulbourethral glands are part of the male internal reproductive system.
testes structure
The testes are small, oval glands, located in a supporting sac called the scrotum, that hangs from the body.
where is the epididymus
The epididymis is located at the back of the testis and connects to the vas deferens.
penis contents
The penis contains the urethra, and three cylinders of spongy erectile tissue. During sexual arousal this tissue fills with blood from the arteries.
Urethra role
The urethra is a tube that travels through the penis to allow both urine from the bladder and sperm from the testes to exit the body.
vas deferens
The vas deferens is a long, muscular tubule that travels from the epididymis to behind the bladder.
seminel vesicles
The seminal vesicles secrete liquid that is added to sperm cells to form semen.
prostate glands
The prostate gland secretes liquid that is added to sperm cells to form semen.
how many ovaries do female have
2
how are the ovaries connected
by the fallopian tube
what is the muscle at the lower end of the uterus
the lower end of the uterus, there is a ring of muscle called the cervix.
blastocyst
the early embryo formed after conception
zygote
is the sex cell thathas been fertilized
difference between identical and fraternal twins
fraternal twins are made of 2 eggs and 2 sperms
identical twins are made of one egg and one sperm cell that separate to form two embryos
