Lecture 3 Flashcards
1
Q
Ovaries (Gonads)
A
Primary female reproductive organs
2
Q
Exocrine part of the ovaries
A
- produces the ova
- Contains a number of follicles
- Each follicle encloses an ovum
3
Q
Endocrine part of the ovaries
A
- produces estrogen and progesterone
4
Q
ovary anatomy
A
5
Q
Oogenesis
A
at Birth: 2 million primary oocytes in primordial follicle – 2n
Puberty: 400 000
400 ova ovulate during reproductive life
6
Q
Spermatogenesis vs Oogenesis
A
7
Q
Ovarian cycle
A
- Phases according to changes in ovaria and endometrium
- Follicular phase: menstruation day 1 to ovulation
- Luteal phase; ovulation to day 1 of menstruation
8
Q
A
9
Q
Ovary has 2 related endocrine units:
A
- Estrogen secreting follicle in 1st half of cycle
- Progesterone & estrogen secreting corpus luteum in 2nd half of cycle
- Is controlled by hormonal relationships between the hypothalamus,
anterior pituitary and the above. - Differential effects on the ovaria dependent on the phase of the cycle:
+ vs – feedback of estrogen
10
Q
Ovarian cycle
A
11
Q
First half of ovarian cycle: follicular phase
A
12
Q
Second half of ovarian cycle: luteal phase
A
13
Q
A
14
Q
Summary of menstrual cycle
A
15
Q
A
