Lecture 03/Lab 1: Female Repro Histology (Baekey) Flashcards
tunica albuginea is composed of what tissue?
dense irregular connective tissue
where do follicles develop?
cortex of ovary
what kind of tissue and what is contained in the medulla of ovary?
vessels and nerves contained in loose connective tissue
4 main layers of the ovary
1) surface epithelium
2) tunica albuginea
3) cortex
4) medulla
rete ovarii
embryonic remnants equivalent to rete testis
hilus cells in ovary produce what?
steroid hormones
Where is the medulla in horses?
on the outside of the ovary
what kind and how many layers of cells in primordial follicle?
1 layer of SQUAMOUS follicular cells
What kind and how many layers of cells in primary follicles?
1 layer of CUBOIDAL follicular cells
what kind and how many layers of cell in secondary follicles?
multiple layers of GRANULOSA cells
fx of zona pellucida
binds spermatozoa and is necessary for acrosomal reaction
cumulus cells
connect membrana granulosa to oocyte in developing follicles (usually tertiary)
Difference b/w secondary and tertiary follicles
tertiary has follicular fluid formed from granulosa cells, forming an antrum
3 kinds of cells granulosa cells differentiate into in tertiary follicles (less important)
1) columnar corona radiata (adjacent to zona pellucida)
2) cumulus cells (surrounds corona)
3) membrana granulosa (lines follicular wall)
theca interna composed of (less important)
epitheliod steroidogenic cells, blood, lymph capillaries
theca externa composed of: (less important)
fibroblastic layer
follicular stigma
site of rupture during ovulation
what does rupture of follicle release?
oocyte, zona pellucida, corona radiata, cumulus
corpus hemorrhagicum
precursor to CL after ovulation occurs.
- fills with blood, capillaries invade
- granulosa cells become granulosa lutein cells
- theca interna cells become theca lutein cells
- transition to endocrine gland which produces progesterone
luteinization
hypertrophy, hyperplasia, and accumulation of lipid pigment in CL
What happens to CL if pregnancy occurs?
enlarges then degrades to corpus albicans after parturition
What happens to CL if pregnancy doesn’t occur?
degenerates and is invaded by connective tissue
corpus atreticum
atretic follicle. Forms from follicles that fail to complete development.
- oocyte liquifies
- zona pellucida thickens and folds
- invasion of connective tissue
- luteinization of theca interna
size of lumen in ampulla vs. isthmus
larger in ampulla