Development Biology Lab - Gametogenesis and Fertilization

Identify the blanked out name for this component of spermatogenesis

Semineferous tubules

Identify the blanked out name for this component of spermatogenesis

Spermatozoa

Primary spermatocyte into secondary spermatocyte transition.

When the sperm becomes haploid from diploid.

Lumen

Haploid, light-shaded area where maturation begins.

Identify the part, and its function.

Basement membrane. Diploid, where spermatogonia begins (primordial sperm creation)

Identify the part, and its function.

Spermatogonia, progenitor sperm cell.

Identify the part, and its function.

Sertoli cell nuclei. Supports the development of sperm cells.

Identify the part, and its function.

Primary spermatocytes. Diploid

Identify the part, and its function.

Early spermatid.

Identify the part, and its function.

Late spermatid. Smaller

Identify the part, and its function.

Leydig cells. Produces and secretes testosterone.

Identify the part, and its function.

Smooth muscle.

Identify the part, and its function.

Spermatogonia

Identify the part, and its function.

Sertoli cells

Identify the part, and its function.

Primary spermatocytes

Identify the part, and its function.

Spermatids

Identify the component

Spermatogonium

Identify the part, and its function.

Nucleus of Sertoli cell.

Identify the part, and its function.

Primary spermatocyte.

Identify the part, and its function.

Spermatids

Identify the part, and its function.

Sertoli cells

Identify the part, and its function.

Leydig cells

Identify the part, and its function.

Spermatogonia

Identify the part, and its function.

Spermatocytes

Identify the part, and its function.

Spermatids

Differentiate frog and rat spermatogenesis

Frogs is more oval/goblet-shaped, Rats are more pyramidal, more uniform organization.

Differentiate Leydig and Sertoli Cells

• Leydig cells are extracellular, and their purpose is to secrete testosterome

• Sertoli cells are close to the cell membrane, and provide nutrients/aid growth of sperm

Zona Pellucida

Barrier of Follicle. Prevents polyspermy fertilization

Corona Radiata

Outside of zona pellucida. Egg’s protein supply

Primordial follicles

Near wall, germinal epithelium. Primary oocyte

Primary follicle

2 Layers/Organized layer of follicle cell surrounds primary oocyte.

Secondary or antral follicle

Small antrum, formation of zona pellucida and corona radiata

Mature or graafian follicle

Large antrum. Will be realeased into ovarian duct

Corpus luteum

Secretes estrogen and progesterone. Remaining cells left behind by egg/follicle. Darker in color

Corpus albicans (white)

Lighter. Dying Corpus luteum